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1. Presentation by:
ADMEC MULTIMEDIA INSTITUTE
www.admecindia.co.in
Indexing and Working Process
of Search Engines

2. The first basic truths, that’s you need to understand in SEO that search
engines are not a human.
 While this might be obvious for everybody, the differences between
how humans and search engines view web pages aren't. Search engines
are text-driven, voice driven and image driven.
 Although now a day’s technology advances rapidly grow, search engines
are far from intelligent creatures that can feel the beauty of a cool design
or enjoy the sounds and movement in movies.
 Instead, search engines crawl the web pages, looking at particular site
content (mainly text) to get an idea about a site.

4. Firstly, search engines crawl the website to see what is on the website. This
task is performed by software, called a crawler or a spider.
Spiders go to website and follow links from one page to another and index
all things, whatever they find on their way. More than 20 billion pages on
the web available, so it is impossible for a spider to visit all site daily just to
see if a new pages is added or any existing page is modified on the web. So
it may be possible that crawlers may not end up visiting your site for a
month or two.
Crawling-
Crawling is a process by which search
engines discover publicly available
web pages. Google uses software
name “web crawlers” for crawling.
The crawl process begins with a list of
web address from past crawls and
sitemaps provided by website owners.

5. What you can do is to check what a crawler sees from your site. As above
mentioned, crawlers are not humans and they do not see images, Flash
movies, JavaScript, frames, password-protected pages and directories, so if
you have added these on your site, you'd better run the Spider
Simulator below to see if these goodies are viewable by the spider. If they
are not viewable, they will not be spidered, not indexed, not processed,
etc. - in a word they will be non-existent for search engines.
Spider-
Spider is a program (set of instructions) that
automatically fetches Web pages. Spiders
are used to feed pages to search engines.
It's crawls over the Web, so it’s called
spider. Another term for these programs is
known as WebCrawler.
Example:
Name of Google Spider is “Googlebot”.
Name of Bing Spider is “Bingbot”.
Name of Alta Vista Spider is “Scooter”.

6. a) When page is crawled by crawler the next step is to index its all the
content.
b) The index page stored in a giant database, from where it can be
access or retrieved later as per requirement.
c) Essentially, the process of indexing is identifying the words that best
describe the page and provides the page to particular keywords
which search on the web.
d) So typical work is very difficult for a human to process such
amounts of information but generally search engines manage just
fine with this task within a few time.
e) Sometimes search engine not get the meaning of a page right but if
we help them by optimizing it, it will be easier for to search engine
to classify your pages correctly and for you – to get higher rankings
and better results.

8. When anybody Query anything in search engine, the search
engine processes it – i.e. it compares the search keywords or string in the
search request with the indexed pages in the stored database.
Since it is likely that more than one page (practically it is millions of pages)
contains the search string or keyword, the search engine starts calculating
the relevancy of each of the pages in its index as the keywords or string
searched and provides best result after calculating the relevancy.
1. The Web server sends the query to the index servers. The content
inside the index server is similar to the index in the back of a book-it
tells which pages contain the words that match the query.
2. The query travels to the doc servers , which actually retrieve the stored
documents. Snippets are generated to describe each search result.
3. The search result are returned to the user in a fraction of a second.

9. Contact Us:
ADMEC MULTIMEDIA INSTITUTE
C-7/114, IInd Floor, Sector- 7, Rohini, Delhi- 85
Landmark: Near Rohini East Metro Station
Helpline 1: +91 9811 818 122
Helpline 2: +91 9911 782 350
ADMEC MULTIMEDIA INSTITUTE
For More information you can visit :
http://www.admecindia.co.in
Or email : info@admecindia.co.in