2. 2012
Google's fight against off-site SEO
Google is relentless in their battle to quell off-site SEO
and push SEO to an on-site-only corner
Panda
BuildMyRank shuts down
Penguin
Unnatural Links Warnings on WMT
4. 2009
The formation of Social Signals
Google reveals new social signals map and invites more
networks to plug their data into Google Analytics
5. 2009
The formation of Social Signals
The protocol is implemented on various popular social
websites
AllVoices Echo Read It Later
Badoo Gigya Reddit
Blogger Google+ Screen Rant
Delicious Google Groups SodaHead
Digg Hatena TypePad
Diigo Livefyre VKontakte
Disqus Meetup yaplog!
7. The formation of Social Signals
December 2011
Eric Schmidt Confirms: The Social Signal is a Ranking Factor
http://www.stateofsearch.com/eric-schmidt-confirms-the-social-signal-is-a-ranking-
factor/
March 2012
Google introduces its new Social Hub to the public
http://analytics.blogspot.co.il/2012/03/capturing-value-of-social-media-using.html
8. The formation of Social Signals
July 2012
Matt Cutts is asked about the value of the new social signals and
explains that “links still perform as a valuable ranking factor”