Google’s head of spam Matt Cutts has repeatedly said that quality content is key to Google rankings, and Bing’s Duane Forrester reminded marketers that “all SEO ranking signals revolve around content of some kind” at SMX Advanced 2011.
The good people at Brafton made an infographic “Why Content For SEO” to explores how content is key to search engine visibility.
It is not just about social. Social is SEO and content is social:
Tweets are used by Google to index content faster
Bing uses FaceBook likes as a ranking signal
Google will use the +1 as a ranking factor