IAB Internet Advertising Revenue Report http://www.iab.net/media/file/IAB_PwC_2008_full_year.pdf

1. IAB Internet Advertising
Revenue Report
An Industry Survey Conducted by PricewaterhouseCoopers
and Sponsored by the Interactive Advertising Bureau (IAB)
2008 Full-Year Results
March 2009



2. Table of Contents
Background 2
Executive Summary 3
Detailed Findings 4
 2008 Fourth-Quarter and Full Year Results
 Annual and Quarterly Trends
 Industry Concentration
 Advertising Formats
 Industry Category Spending
 Pricing Models
Appendix 15
 Survey Scope and Methodology
 IAB Board Officers and Directors
 Organization Profiles

3. Background
About the IAB Internet Advertising Revenue Report
Conducted by PricewaterhouseCoopers LLP on an ongoing basis, with results released
quarterly, the “Internet Advertising Revenue Report” was initiated by the Interactive Advertising
Bureau (IAB) in 1996. This report utilizes data and information reported directly to
PricewaterhouseCoopers LLP, publicly available online corporate data and information provided
by online ad selling companies.
The results reported are considered the most accurate measurement of Internet/online
advertising revenues because the data is compiled directly from information supplied by
companies selling advertising online. All-inclusive, the report includes data reflecting online
advertising revenues from Web sites, commercial online services, ad networks and e-mail
providers, as well as other companies selling online advertising.
The report is conducted independently by PricewaterhouseCoopers LLP on behalf of the IAB.
PwC does not audit the information and provides no opinion or other form of assurance with
respect to the information. Only aggregate results are published and individual company
information is held in strict confidence with PricewaterhouseCoopers LLP. Further details
regarding scope and methodology are provided in the appendix to this report.
David Silverman
PricewaterhouseCoopers LLP
PricewaterhouseCoopers LLP 2

4. Executive Summary
IAB Internet Advertising Revenue Report
2008 Full Year Highlights
Internet advertising revenues (“revenues”) in the United States totaled $23.4 billion for the full year of 2008,
with Q3 accounting for approximately $5.8 billion and Q4 totaling approximately $6.1 billion. Internet advertising
revenues for the full year of 2008 increased 10.6 percent over 2007.
Key trends underlying 2008 results
 Re e e Co i et o
v nu s ntnu oP stRe o dRe ls—Internet advertising revenue in the U.S. totaled $6.1 billion
cr sut
in the fourth quarter of 2008, an increase of 4.5 percent from the 2008 third-quarter total of $5.8 billion, and
an increase of 2.6 percent from the 2007 fourth-quarter total of $5.9 billion. Full year Internet advertising
revenues of 2008 totaled $23.4 billion, up 10.6 percent from the $21.2 billion reported in 2007.
“We are seeing an ongoing secular shift from traditional to online media as marketers recognize that ad
dollars invested in interactive media are effective at influencing consumers and delivering measurable
results. In this uncertain economy, where marketers know they need to do more with less, interactive
advertising provides the tools for them to build deep, engaging relationships with consumers—the
experience marketers gain from this will deliver dividends especially after the economy turns around.”
—Randall Rothenberg, President and CEO, IAB
 Se r hCo i e t e d flo e y spa Ba r a
ac ntnu s oL a , l w db Di l y nnes ndCl ssii d
o a f s—Search revenue accounted
e
for 46 percent of 2008 fourth-quarter revenues, up from the 42 percent reported in 2007. Display Banner
advertising, the second largest format, accounted for 21 percent, followed by Classifieds (13 percent), Lead
Generation (7 percent) and Rich Media (7 percent) of 2008 fourth-quarter revenues.
“Though some categories in the fourth quarter slowed or even dipped, reflecting the current economic
challenges, the overall performance is up, confirming interactive’s ever-growing importance to the
successful marketing mix.”
—David Silverman, Partner, PricewaterhouseCoopers LLP
PricewaterhouseCoopers LLP 3

5. Detailed Findings
Revenues Totaled $6.1 Billion in the Fourth Quarter of 2008
Online ad sellers reported aggregate revenues totaling $6.1 billion for the fourth quarter of 2008.
 Total 2008 fourth-quarter revenues were $154 million (2.6 percent) higher than the fourth quarter of 2007, and
$263 million (4.5 percent) higher than the third quarter of 2008.
2007 Q4 vs. 2008 Q4
$7,000
$6,100
$5,946 2.6%
$6,000
$5,000
$ millions
$4,000
$3,000
$2,000
$1,000
$0
2007 Qtr 4 2008 Qtr 4
2008 Q3 vs. 2008 Q4
$7,000
$6,100
4.5%
$5,838
$6,000
$5,000
$ millions
$4,000
$3,000
$2,000
$1,000
$0
2008 Qtr 3 2008 Qtr 4
PricewaterhouseCoopers LLP 4

6. 2008 Annual Revenues Totaled Over $23 Billion
 Annual revenues for 2008 totaled $23.4 billion, $2.2 billion or 10.6 percent higher than reported for 2007.
Annual Revenues — 2007 vs. 2008
$23,448
10.6%
$21,206
$20,000
$ millions
$15,000
$10,000
$5,000
$0
2007 2008
Historical Revenue Mix First Half vs. Second Half
 With a continuous weakening in the economic environment, the second half percentage mix saw a decline to 51%.
This was the lowest percentage mix for the second half since 2002.
$23.4B
$24,000
$22,000 $21.2B
$20,000
$18,000 $16.9B $11,938 51%
$16,000 $11,213 53%
$ millions
$12.5B
$14,000
$8,970 53%
$12,000
$9.6B
$10,000
54%
$6,755
$8.1B
$7.3B
$8,000 $7.1B
$6.0B $5,027 52%
$6,000 $4,074 50% 49%
$11,510
$4.6B $3,414 48% $3,975 55% $9,993 47%
$3,032 50%
$4,000 $7,909 47%
$2,994 65% 46%
48% $5,787
$4,599
$2,000 $4,013 50% $3,720 52% 45%
$3,292
$2,978 50%
$1,627 35%
$0
1999 2000 2001 2002 2003 2004 2005 2006 2007 2008
First Six Months Last Six Months
PricewaterhouseCoopers LLP 5

7. Annual Revenue Trends
 Annual revenues have increased significantly on a year-over-year percentage and dollar basis for the sixth consecutive
year, after declining in 2001 and 2002.
Annual $ Revenue — 1997 through 2008
$25,000 $23,448
$21,206
$20,000
$16,879
$ millions
$15,000
$12,542
$9,626
$10,000
$8,087
$7,267
$7,134
$6,010
$4,621
$5,000
$1,920
$907
$0
1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008
Historical Quarterly Revenue Trends
 Since the third quarter of 2002, revenues have increased 22 of the past 25 consecutive quarters.
 Quarterly Revenue growth remains strong on a cumulative year-over-year percentage and dollar basis.
 Seasonal 2008 fourth quarter lift of 4.5% is the smallest such increase since 2001.
Quarterly $ Revenue Growth Comparisons — 2000-2008
$ 48
23,4
$,6
2120
$ 07
88
, $1
7 34
, $ 00
6, 1 $ 267
7, $ 626
9, $ 54
12
2, $ 89
17
6,
$ 6, 100
$ 5, 946
$ 5, 765
$6,000
$ 5, 838
$ 5, 745
$ 5, 094
$ 5, 267
$5,000
$ 4, 899
$ 4, 784
$ millions
$ 4, 061
$ 4, 186
$4,000 $ 3, 608
$ 3, 848
$ 2, 985
$3,000 $ 2, 694 $ 3, 147
$ 2, 369
$ 2, 182 $ 2, 802
$ 1, 872
$ 2, 091
$ 1, 848
$2,000 $ 1, 660
$ 1, 641 $ 1, 458 $ 1, 580 $ 2, 182
$ 2, 230
$ 1, 922 $ 1, 951
$ 2, 123 $ 1, 773 $ 1, 793
$ 1, 520 $ 1, 632
$ 1, 451
$1,000
Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4
208
0
200
0 201
0 202
0 203
0 204
0 205
0 206
0 207
0
PricewaterhouseCoopers LLP 6

8. Historical Revenue Performance
 Annual and Quarterly Revenue Growth Comparisons
% G ROW TH
% G ROW TH
$ vMli ns
Re i o
l Qt/r
rQt Ye r a
a/ r
Ye
$ vMli ns
Re i o
l Qt/r
rQt Ye r a
a/ r
Ye
1Q03 $1,632 3% 7%
1Q97 $130 18% 333%
2Q03 $1,660 2% 14%
2Q97 $214 66% 313%
3Q03 $1,793 8% 24%
3Q97 $227 6% 200%
4Q03 $2,182 22% 38%
4Q97 $336 48% 205%
To a203
tl 0 $ 267
7, 21
%
To a1 7
tl 99 $7
90 239%
1Q04 $2,230 2% 37%
1Q98 $351 5% 171%
2Q04 $2,369 6% 43%
2Q98 $423 20% 97%
3Q04 $2,333 -2% 30%
3Q98 $491 16% 116%
4Q04 $2,694 15% 24%
4Q98 $656 34% 95%
To a204
tl 0 $ 626
9, 33%
To a1 8
tl 99 $9
1 20
, 1
12%
1Q05 $2,802 4% 25%
1Q99 $693 6% 97%
2Q05 $2,985 7% 26%
2Q99 $934 35% 121%
3Q05 $3,147 5% 35%
3Q99 $1,217 30% 148%
4Q05 $3,608 15% 34%
4Q99 $1,777 46% 171%
To a205
tl 0 $ 54
12
2, 30%
To a1 9
tl 99 $ 621
4, 1%
41
1Q06 $3,848 7% 37%
1Q00 $1,922 8% 177%
2Q06 $4,061 6% 36%
2Q00 $2,091 9% 123%
3Q06 $4,186 3% 33%
3Q00 $1,951 -7% 60%
4Q06 $4,784 14% 33%
4Q00 $2,123 9% 19%
To a200
tl 0 $ 07
88
, 75% To a206
tl 0 $ 89
17
6, 35%
1Q01 $1,872 -12% -3% 1Q07 $4,899 2% 27%
2Q01 $1,848 -1% -12% 2Q07 $5,094 4% 25%
3Q01 $1,773 -4% -10% 3Q07 $5,267 3% 26%
4Q01 $1,641 -7% -23% 4Q07 $5,946 13% 24%
To a207
tl 0 $ ,6
21 20 26%
To a201
tl 0 $1
7 34
, -
12%
1Q08 $5,765 -3% 18%
1Q02 $1,520 -7% -19%
2Q08 $5,745 0% 13%
2Q02 $1,458 -4% -21%
3Q08 $5,838 2% 11%
3Q02 $1,451 -1% -18%
4Q08 $6,100 4% 2%
4Q02 $1,580 9% -4%
To a202
tl 0 $ 00
6, 1 -1 6% To a208
tl 0 $23,448 1
1%
Industry Revenue Concentration Remains High
 Online advertising continues to remain concentrated with the ten leading ad-selling companies, which accounted
for 72 percent of total revenues in the fourth quarter of 2008, up slightly from the 69 percent reported for the fourth
quarter of 2007.
 Companies ranked 11th to 25th accounted for 11 percent of revenues for the fourth quarter of 2008, compared to
the 12 percent reported in the fourth quarter of 2007. Companies ranked 26th to 50th accounted for 8 percent,
compared to the 9 percent reported in 2007.
% Share of total revenues
100
90
TOP 50
91%
80
TOP 25
83%
70
% of Total
60
Top 50
50 companies
72% command
40 90% of online
ad market
30
TOP 10
20
$ ,6M
2120
8 8 M $1
7 34M
, $ 89
1 7M
6,
$ 07
, $ 00
6, M
1 $ 4 8M
23,4
$ 267
7,M $ 626 M
9, $ 54 M
12
2,
10
0
Q1Q2Q3Q4Q1Q2Q3Q4Q1Q2Q3Q4Q1Q2Q3Q4Q1Q2Q3Q4Q1Q2Q3Q4Q1Q2Q3Q4Q1Q2Q3Q4Q1Q2Q3 Q4
200
0 201
0 202
0 203
0 204
0 205
0 206
0 207
0 208
0
PricewaterhouseCoopers LLP 7

9. Search, Display and Classifieds Lead Ad Formats – 2008 Fourth Quarter Results
 Search revenues accounted for 46 percent of 2008 Q4 revenues, up from the 42 percent reported for the same period in
2007. Search revenues totaled $2.8 billion in the fourth quarter of 2008, up 13 percent from the fourth quarter of 2007,
when Search revenues totaled $2.5 billion.
 Display-related advertising accounted for $2.0 billion or 33 percent of total revenues during the fourth quarter of 2008,
down nearly 4.3 percent from the $2.1 billion (35 percent of total) reported in the fourth quarter of 2007. Display-related
advertising includes Display Banner Ads (21% of 2008 Q4 revenues or $1.3 billion), Rich Media (7% or $434 million),
Digital Video (3% or $207 million), and Sponsorship (1% or $87 million).
 Classifieds revenues totaled $769 million or 13 percent of 2008 fourth-quarter revenues, down 8 percent from the $832
million (14 percent of total) reported in the fourth quarter of 2007.
 Lead Generation revenues accounted for 7 percent of the 2008 fourth-quarter revenues or $433 million, up 4 percent from
the $416 million (7 percent) reported in the fourth quarter of 2007.
Internet Ad Revenues by Advertising Format – 2008 Fourth Quarter Results
% o 208F ut - at r v nu s
f 0 o rhQu re Re e e
Digital Video*
Rich Media* 3%
Banner Ads*
7%
21%
Lead Generation
7%
E-mail
Sponsorship*
1%
1%
Classifieds
13%
Search
46%
To a 6. li n
t l–$ 1 lo
Bi
% o 207 o rhQu re Re e e
f 0 F ut - at r v nu s
Digital Video*
Rich Media*
2%
9% Banner Ads*
21%
Lead Generation
7%
E-mail Sponsorship*
2% 3%
Classifieds
Search
14%
42%
To a 5. li n
t l–$ 9 lo
Bi
* Display Related Advertising includes Rich Media, Digital Video, Banner Ads, and Sponsorship
PricewaterhouseCoopers LLP 8

10. Search, Display and Classifieds Lead Ad Formats – 2008 Full Year Results
 Search remains the largest revenue format, accounting for 45 percent of 2008 full year revenues, up from the 41 percent
reported in 2007. Search revenues totaled $10.5 billion for the full year 2008, up 20 percent from the $8.8 billion reported
in 2007.
 Display-related advertising revenues totaled $7.6 billion or 33 percent of full year 2008 revenues, up nearly 8 percent from
the $7.1 billion (34 percent of total) reported in 2007. Display-related advertising includes Display Banner Ads (21% of
2008 full year revenues or $4.9 billion), Rich Media (7% or $1.6 billion), Digital Video (3% or $734 million), and
Sponsorship (2% or $387 million).
 Classifieds revenues accounted for 14 percent of 2008 full year revenues or $3.2 billion, down 4 percent from the $3.3
billion (16 percent of total) reported in 2007.
 Lead Generation revenues accounted for 7 percent of 2008 full year revenues or $1.7 billion, up 6 percent from the $1.6
billion (7 percent) reported in 2007.
Internet Ad Revenues by Advertising Format – 2008 Annual Results
% o 208F l a Re e e
f 0 ulYe r v nu s
Digital Video*
3%
Rich Media*
Banner Ads*
7%
21%
Lead Generation
7%
E-mail
2%
Sponsorship*
2%
Classifieds
14%
Search
45%
To a 23. li n
t l–$ 4Bi o
l
% o 207 ulYe r v nu s
f 0 F l a Re e e
Rich Media* Digital Video*
Banner Ads*
8% 2%
21%
Lead Generation
7%
E-mail
2% Sponsorship*
3%
Classifieds
Search 16%
41%
To a 21 Bi i n
t l–$ . l o
2l
* Display Related Advertising includes Rich Media, Digital Video, Banner Ads, and Sponsorship
PricewaterhouseCoopers LLP 9

11. Historical Format Trending
 Search has remained the leading format since 2004, and has had strong sequential growth over this period. Search is
followed by Display Banners and Classifieds/Directories in percentage share of Internet advertising.
 Of the 5 major format categories depicted, only two have seen sustained losses in percentage share. Sponsorship
revenues have dipped from 8% of total revenues in 2004 to 2% of total revenues in 2008, while Classifieds/Directories
revenues have dropped from 18% of total in 2004 to 14% in 2008.
Internet Ad Revenue Share by Advertising Format – 2004 – 2008*
50%
45%
40%
35%
% o To aRe e e
f t l v nu
30%
25%
20%
15%
10%
5%
0%
Search Display B anners Classifieds Rich M edia and Lead Spo nso rships
Digital Video Generatio n
F 20 4
Y 0 F 20 5
Y 0 F 20 6
Y 0 F 20 7
Y 0 F 20 8
Y 0
*Format definitions may have changed over time period depicted, both within the survey process and definitionally by survey respondents.
PricewaterhouseCoopers LLP 10

12. Retail Advertisers Continue to Drive Consumer Ad Spending – 2008 Annual Results
 Retail advertisers continue to represent the largest category of Internet ad spending, accounting for 22 percent of revenues
for the full year of 2008 or $5.0 billion, down from the 25 percent ($5.4 billion) reported in 2007.
 Financial Services advertisers represented the second-largest category of spending at 13 percent of 2008 full year
revenues or $3.0 billion, down from the 15 percent ($3.2 billion) reported in 2007.
 Automotive advertisers accounted for the third-largest category of spending at 12 percent of 2008 full year revenues or
$2.8 billion, up slightly from the 12 percent ($2.5 billion) reported in 2007.
 Computing advertisers represented the fourth-largest category of spending at 12 percent of 2008 full year revenues or $2.7
billion, up slightly from the 11 percent reported ($2.3 billion) for the full year of 2007.
 Telecom companies accounted for 9 percent of 2008 full year revenues or $2.0 billion, up slightly from the 8 percent ($1.7
billion) reported in 2007, while Leisure Travel (airfare, hotels & resorts) accounted for 6% of revenues ($1.4 billion)
compared to the 7 percent or $1.5 billion reported in 2007.
 Media accounted for 5 percent of revenues for the full year of 2008 or $1.3 billion, down slightly from the 6 percent ($1.3
billion) reported in 2007.
 Consumer Packaged Goods and Food Products represented 6 percent of full year revenues ($1.5 billion) up from the 4%
or $925 million reported in 2007. Entertainment accounted for at 4% of 2008 full year revenues ($917 million), down
slightly from the 5% ($1.0 billion) reported in 2007.
Internet Ad Revenues by Major Industry Category*
2008 Full Year ($23.4B) vs. 2007 Full Year ($21.2B)
25%
22%
20%
15%
% of total revenues
13%
12% 12%
12%
11%
10% 9%
8%
7%
6%
6% 6%
5%
5%
4% 4% 4%
4%
0%
Retail Financial Computing Automotive Telecom Leisure Travel Media Consumer Entertainment Pharma &
Services Packaged Healthcare
Goods
2007 Full Year 2008 Full Year
* Categories listed represent the top categories ranked by revenue, and may not add up to 100 percent. Prior reports included Retail, Automotive, CPGs, Leisure Travel and
Entertainment as components of Consumer-Related Advertising. Categories have been updated during 2008 survey process, please see pg. 16 for information on updated
categories.
PricewaterhouseCoopers LLP 11

13. Performance-Based Pricing Gains
 Approximately 57 percent of 2008 full year revenues were priced on a performance basis, up from 51 percent
reported in 2007.
 Approximately 39 percent of 2008 full year revenues were priced on a CPM or impression basis, down from
45 percent in 2007.
 Approximately 4 percent of 2008 full year revenues were priced on a hybrid basis, consistent with the 4 percent
reported for the same period in 2007.
Internet Ad Revenues by Pricing Model
% o 208F ut - at r v nu s
f 0 o rhQu re Re e e % o 207 o rhQu re Re e e
f 0 F ut - at r v nu s
Hybrid
Hybrid
4%
4%
CPM
39%
CPM
Performance
45%
51%
Performance
57%
To a 5. li n
t l–$ 9 lo
Bi
To a 6. li n
t l–$ 1 lo
Bi
% o 208F l a Re e e
f 0 ulYe r v nu s % o 207 ulYe r v nu s
f 0 F l a Re e e
Hybrid
Hybrid
4%
4%
CPM
39%
CPM
Performance
45%
51%
Performance
57%
To a 23. li n
t l–$ 4Bi o
l To a 21 Bi i n
t l–$ . l o
2l
PricewaterhouseCoopers LLP 12

14. Historical Pricing Model Trends
 Performance based pricing, the most prevalent pricing model since 2006, has maintained a strong sequential growth rate
and is closely followed by CPM/Impression based pricing. Hybrid pricing has seen the greatest loss in percentage revenue
over the period, dipping sharply from 17% in 2004 to 4% in the full year of 2008.
Internet Ad Revenues by Pricing Model – 2004 – 2008*
60%
57%
48% 51%
50%
46%
45%
CPM 47%
42%
f t lRe e e
% o To a v nu s
40% 41%
41% P ro ma e
efr nc 39%
30%
20% 17%
H yr
bid 13%
10%
4%
5% 4%
0%
FY 2004 FY 2005 FY 2006 FY 2007 FY 2008
CPM Perf ormance Hy brid
*Pricing model definitions may have changed over time period depicted, both within the survey process and definitionally by survey respondents.
PricewaterhouseCoopers LLP 13

15. Cross Media Advertising Marketshare
 The Internet has continued to grow in significance when compared to other ad-supported media.
U.S. Advertising Market – Media Comparison – 2008 ($ Billions)
Ne s p p r
w a es $34.4
TV Di ti ui n
s r to
b $28.8
I ene
nt r t $23.4
TV N ew o k Ca l
t r s: be $21.4
$17.2
Ra i
do
TV N ew o k Br a c s tNew o k
t r s: o d a tr $18.0
Co u e M g zne
ns m r a ai s $12.7
Die t r
r co y $13.8
Tr d
a eAd ets i
v r ng
i $10.0
$7.2
Ou f o e
to H m
$
- $
10 $
20 $
30 $
40 $
50
*The total U.S. advertising market includes other segments not charted here.
*“TV Distribution” includes national and local TV station ads as well as multichannel system ads.
Sources: IAB Internet Ad Revenue Report; PricewaterhouseCoopers Global Entertainment and Media Outlook
Initial Year Growth Comparisons–Internet Advertising vs. Broadcast and
Cable Television
 The first 14 years of Internet Advertising (1995-2008) were charted against broadcast television (1949-1962) and cable
television (1980-1993), presented in current inflation-adjusted dollars.
 Internet Advertising revenues continue to far outpace the growth of Cable Television and Broadcast Television during each
of their first 14 years.
Annual $ Ad Revenue Growth—First 14 Years
$24,000 $ 48
23,4
$,6
2120
$21,000
$18,000 $ 89
17
6,
$15,000
$ 54
12
2,
$12,000
$ millions
$ 626
9,
$9,000 $ 07
88
,
$ 267
7,
$1
7 34
,
$ 00
6, 1 $ 259
13,
$6,000 $ ,7
17
11
$ 621
4, $,0
18
07
$7
9 66
,
$8
8 59
,
$1
88
,8
$8 5
78
,
$ 557
6,
$3,000 $
55 $267 $7
9
0 $9
1 20
, $0
5,30
$ 69
3, 8
$
358 $ 02
11
, $1
2,62 $ 77
2, 8
$7
14 $5
29 $9
4 9 $5
74 $1
19
,0 $ 58
10
, $8
1 53
, $ 00
2,8 $4 5
2,9 $1
3, 0
8 $ 654
3, $0
4 59
, $8 6
41
, $ 50
6, 1
$0
Year 1 Year 2 Year 3 Year 4 Year 5 Year 6 Year 7 Year 8 Year 9 Year 10 Year 11 Year 12 Year 13 Year 14
Broadcast Cable Internet
Sources: IAB Internet Ad Revenue Report; PricewaterhouseCoopers LLP, Universal McCann
PricewaterhouseCoopers LLP
14

16. Appendix
Definitions of Leading Industry Categories
The industry categories used in the IAB Internet Advertising Revenue Report were sourced from
the North American Standard Industrial Classification (SIC) Manual.†
Retail—includes mail order/catalog, apparel, restaurants/fast food, home furnishings/textiles,
toys, pet food/supplies, appliances, jewelry, drug stores, retail stores and cosmetics.
Automotive—includes all automotive-related categories including sale/purchase of vehicles
and parts and maintenance.
Entertainment—includes film, music, TV, box office, video games and amusement &
recreation.
Consumer Packaged Goods—includes packaged goods, food products household
products and tobacco.
Leisure Travel—includes travel, hotel, airlines and resorts.
Computing Products—includes hardware (computers, computer storage devices, and
computer peripheral equipment), consumer electronics, prepackaged software (operating, utility
and applications programs), local area network systems and network systems integration,
computer processing and data preparation and data processing services.
Financial Services—includes commercial banks, credit agencies, personal credit institutions,
consumer finance companies, loan companies, business credit institutions and credit card
agencies. Also includes companies engaged in the underwriting, purchase, sale or brokerage of
securities and other financial contracts.
Telecommunications—includes point-to-point communications services, including telephone
voice and data communications, two-way mobile/cellular communications services and other
non-vocal message communications services (e.g., cablegram, electronic mail and facsimile).
Media—includes establishments primarily engaged in radio and television broadcasting
(network and station) including commercial, religious, educational and other radio or television
stations. Includes multi-channel video providers on a subscription fee basis (e.g., cable
television, wireless cable television and direct broadcast satellite services). Also includes
establishments primarily engaged in publishing newspapers, periodicals and books.
†Survey participants reported results based on the 21 industry categories listed on page 17, which
were used specifically for the IAB Internet Advertising Revenue Report. This is consistent with other
relevant industry categorization sources that measure advertising spending by industry. For
purposes of this report, PricewaterhouseCoopers classified a number of individual categories under
“Retail.”
PricewaterhouseCoopers LLP 15

17. Definitions of Advertising Formats
Display Advertising (Banner Ads)—advertiser pays an Internet company for space to display a static or hyper-linked
banner or logo on one or more of the Internet company’s pages.
Sponsorship—represents custom content and/or experiences created for an advertiser which may or may not include ad
elements such as display advertising, brand logos, advertorial or pre-roll video. Sponsorships fall into several categories:
 Spotlights are custom built pages incorporating an advertiser’s brand and housing a collection of content usually around a
theme;
 Advergaming can range from an advertiser buying all the ad units around a game or a “sponsored by” link to creating a
custom branded game experience;
 Content & Section Sponsorship is when an advertiser exclusively sponsors a particular section of the site or email (usually
existing content) re-skinned with the advertiser’s branding;
 Sweepstakes & Contests can range from branded sweepstakes on the site to a full-fledge branded contest with
submissions and judging
E-mail—banner ads, links or advertiser sponsorships that appear in e-mail newsletters, e-mail marketing campaigns and
other commercial e-mail communications. Includes all types of electronic mail (e.g., basic text or HTML-enabled).
Search—fees advertisers pay Internet companies to list and/or link their company site domain name to a specific search
word or phrase (includes paid search revenues). Search categories include:
 P i i i s—text links appear at the top or side of search results for specific keywords. The more a marketer pays, the
a stng
dl
higher the position it gets. Marketers only pay when a user clicks on the text link.
 Co e t a ac —text links appear in an article based on the context of the content, instead of a user-submitted
nt xu lse r h
keyword. Payment only occurs when the link is clicked.
 P i ncu o
a di l si n—guarantees that a marketer’s URL is indexed by a search engine. The listing is determined by the
engine's search algorithms.
 Sieo tmiai n—modifies a site to make it easier for search engines to automatically index the site and hopefully result
t p i z to
in better placement in results.
Lead Generation—fees advertisers pay to Internet advertising companies that refer qualified purchase inquiries (e.g., auto
dealers which pay a fee in exchange for receiving a qualified purchase inquiry online) or provide consumer information
(demographic, contact, behavioral) where the consumer opts into being contacted by a marketer (email, postal, telephone,
fax). These processes are priced on a performance basis (e.g., cost-per-action, -lead or -inquiry), and can include user
applications (e.g., for a credit card), surveys, contests (e.g., sweepstakes) or registrations.
Classifieds and auctions—fees advertisers pay Internet companies to list specific products or services (e.g., online job
boards and employment listings, real estate listings, automotive listings, auction-based listings, yellow pages).
Rich media—advertisements that incorporate animation, sound, and/or interactivity in any format. It can be used either
singularly or in combination with the following technologies: sound, Flash, and with programming languages such as Java,
JavaScript, and DHTML. It is deployed via standard Web and wireless applications including e-mail, static (e.g. .html) and
dynamic (e.g. .asp) Web pages, and may appear in ad formats such as banners, buttons and interstitials. Interstitials are
included in the rich media category and represent full- or partial-page text and image server-push advertisements which
appear in the transition between two pages of content. Forms of interstitials can include splash screens, page takeovers and
pop-up windows.
Digital Video Commercials—TV-like advertisements that may appear as in-page video commercials or before, during,
and/or after a variety of content in a player environment including but not limited to, streaming video, animation, gaming, and
music video content. This definition includes digital video commercials that appear in live, archived and downloadable
streaming content.
PricewaterhouseCoopers LLP 16

18. Survey Scope
The Interactive Advertising Bureau (IAB) retained PricewaterhouseCoopers to establish a comprehensive standard for
measuring the growth of Internet/online advertising revenues.
 The IAB Internet Advertising Revenue Report is part of an ongoing IAB mission to provide an accurate barometer of
Internet advertising growth.
 To achieve differentiation from existing estimates and accomplish industry-wide acceptance, key aspects of the survey
include:
– Obtaining historical data directly from companies generating Internet/online advertising revenues;
– Making the survey as inclusive as possible, encompassing all forms of Internet/online advertising, including Web sites,
consumer online services, ad networks and e-mail providers; and
– Ensuring and maintaining a confidential process, only releasing aggregate data.
Methodology
 PricewaterhouseCoopers:
– Compiles a database of industry participants selling Internet/online advertising revenues.
– Conducts a quantitative mailing survey with leading industry players, including Web publishers, ad networks,
commercial online service providers, e-mail providers and other online media companies.
– Supplemental Data is acquired through the use of publicly disclosed information
– Requests and compiles several specific data items, including monthly gross commissionable advertising revenue by
industry category and transaction.
– Identifies non-participating companies and applies a conservative revenue estimate based on available public sources.
– Analyzes the findings, identifies and reports key trends.
– The 2001 and 2000 full-year revenue data were adjusted to reflect revenue restatements reported in public filings by
several individual companies. Those reported restatements totaled $77 million in 2001 and $138 million in 2000.
Historical industry revenue figures are now adjusted to $7.134 billion in 2001 and $8.087 billion in 2000.
Survey Industry Categories
Entertainment (Film, Music, TV, Box Professional Sports and Sporting &
Automotive
Office, Video Games, Athletic Goods
Beer/Wine/Liquor
Amusement/Recreational) Real Estate
Beverages (Non-Alcoholic)
Financial Services (Banks, Insurance, Restaurants/ Fast food
Business Products/Services Securities, Mortgages)
Retail and Apparel
Computers (Hardware/Software) and Health Care Products and
Consumer Electronics Telecommunications
Services/Pharmaceuticals
Consumer Packaged Goods and Toys/Games
Internet/ISP/E-commerce
Food Products Leisure Travel (Airfare, Hotels, Resorts)
Manufacturing
Educational Services Business Travel (Airfare, Hotels, Resorts)
Media
PricewaterhouseCoopers LLP 17

19. Overall Report Guidance Provided by IAB Leadership
Executive Committee
Chair President Vice Chair
W e a ar Mlad
nd H ri i r
s l Ra a
nd l t e eg
lRo h nb r Dai o r
vdM o e
Martha Stewart Living Omnimedia IAB 24/7 Real Media
Ti A r to
m ms r ng M ri Ni e ot
atn s nh lz St v a sw o t
e eW d rh
Google New York Times Company Disney Interactive Media Group
Jm Sp nfl r
i a ele
NelA s h
i e
Forbes.com
CBS Interactive
Board of Directors
Ti A r to
m ms r ng Pt r oa
ee H r n Ra a
nd l t e eg
lRo h nb r
Google Goodmail Systems Interactive Advertising Bureau
NelA s h
i e Sc t o e
o tH w W ar n Sc lc tng
re hi hi
CBS Interactive Microsoft Comcast Spotlight
J h Bat le
o n tel Ra y l o e
nd Ki r
g Vi e Sh h
vk a
Federated Media Tremor Media Time Inc.
J fBema
ef r n L o L vt
e n e it Ti Sh r e
na aky
Fox Interactive Media/MySpace Cox Newspapers BabyCenter
BobCar a
ri n
g Chi M
ras TadSmiht
IDG Communications The Washington Post Company Reed Business
Saa
r hCh b
ub DaeM d e
v ad n Jm Sp nfl r
i a ele
CondéNast Digital WildTangent Forbes.com
G r g l ma
e Coe n G r g c s te
e M Ca l Na a ir t
d Stra
AOL/Platform A AT&T Converged Services MTV Networks
Ke i Co o
vn nr y Ri y c no g
l M Do u h
e Bild
lTo d
Univision Thomson Reuters ValueClick
G rg A l a
e D’ b G od n M L o
ro c e d St v a sw o t
e eW d rh
CNN Wall Street Journal Digital Network Disney Interactive Media Group
J nah n E et
o ta w r W e a ar Mlad
nd H ri i r
s l Mk a a
i eW l t
rh
LookSmart Martha Stewart Living Omnimedia Yahoo!
J eFv ah
o ie s Dai o r
vdM o e J fW e b r
ef b e
Weather Channel Interactive 24/7 Real Media USAToday
Mt hG ou
ic lb Ptr y r
ee Nal o M t ie
atW s
cars.com NBC Universal Q Interactive
J c G rf
ak i i fn M ri Ni e ot
atn s nh lz
Meredith NY Times Company
Ex-Officio
Founding Chairman
Treasurer Secretary
Ri hL F r y
c e ug
Br c o d n
u eG r o J s e hRo e a m
op s nb u
Archer Advisors
Disney Interactive Media Group Reed Smith LLP
DaeM r a
v o gn
TENNIS.COM
About the Interactive Advertising Bureau
The Interactive Advertising Bureau (IAB) is comprised of more than 375 leading media and technology companies who are responsible for
selling 86% of online advertising in the United States. On behalf of its members, the IAB is dedicated to the growth of the interactive
advertising marketplace, of interactive’s share of total marketing spend, and of its members’ share of total marketing spend. The IAB
educates marketers, agencies, media companies and the wider business community about the value of interactive advertising. Working
with its member companies, the IAB evaluates and recommends standards and practices and fields critical research on interactive
advertising. Founded in 1996, the IAB is headquartered in New York City with a Public Policy office in Washington, D.C. For more
information, please visit www.iab.net.
PricewaterhouseCoopers LLP 18

20. PricewaterhouseCoopers
New Media Group
PricewaterhouseCoopers (www.pwc.com) provides industry-focused assurance, tax and
advisory services to build public trust and enhance value for its clients and stakeholders. More
than 154,000 people in 153 countries share their thinking, experience and solutions to develop
fresh perspectives and practical advice.
© 2008 PricewaterhouseCoopers LLP. All rights reserved. quot;PricewaterhouseCoopersquot; refers to
PricewaterhouseCoopers LLP or, as the context requires, the PricewaterhouseCoopers global
network or other member firms of the network, each of which is a separate and independent
legal entity.
PricewaterhouseCoopers’ New Media Group was the first practice of its kind at a Big Four firm.
Currently located in New York, Los Angeles, Boston, Seattle and the Bay Area, our New Media
Group includes accounting, tax and consulting professionals who have broad and deep
experience in the three areas that converge to form new media: advanced telecommunications,
enabling software and content development/distribution.
Our services include:
 Business assurance services
 Web audience measurement and advertising delivery auditing and advisory
 IAB Measurement Certification Compliance auditing
 Privacy policy structuring, attestation and compliance advisory
 Mergers & Acquisition assistance
 Tax planning and compliance
 Capital sourcing and IPO assistance
For information about our New Media Group, contact one of the following
PricewaterhouseCoopers LLP professionals:
New York Boston
Dai l ema
vdSi r nv Vi er
cP ti
Partner, Assurance Services Partner, Assurance Services
646.471.5421 617.478.1698
david.silverman@us.pwc.com victor.petri@us.pwc.com
Ru s Sa i nz
s pe a San Jose
Partner, Advisory Services Mk e r
i eP al
646.471.1517 Partner, Assurance Services
russell.j.sapienza@us.pwc.com 408.817.3801
michael.pearl@us.pwc.com
Seattle
Su a
z nneF uk r
a l ne
Partner, Assurance Services
206.398.3550
suzanne.faulkner@us.pwc.com
PricewaterhouseCoopers LLP 19

21. pwc.com/e&m
NY-GR-08-0221-A © 2008 PricewaterhouseCoopers LLP. All rights reserved. “PricewaterhouseCoopers” refers to PricewaterhouseCoopers LLP (a
Delaware limited liability partnership) or, as the context requires, the PricewaterhouseCoopers global network or other member firms of the network,
each of which is a separate and independent legal entity.