Many associate the idea of SEO 2.0 unbridled use of portals to achieve social bookmarking links. This idea is not wrong but very superficial. The same situation occurred when we began to talk about Web 2.0, many have abused term, many believed it was a graphic style (so much so that in turn are hundreds of sites with "graphic web 2.0") . Basically the term Web 2.0 was coined only because it was realised that the web was no longer just "the website" but had become something more complex applications online, webservices, xml etc. .. The idea of SEO 2.0 born for the same reason which was born on Web 2.0, now optimization SEO should not be made solely and exclusively on the texts. Many have heard or read the sentence cult of seo "Content is king", as you can see we talk about content, not texts. The contents are varied, text, images, video, pdf etc. ... The SEO 2.0 "should take note that the visits can come from multiple sources" content ", then it would be stupid to focus exclusively on the texts.