Socialmediatoday : "Social signals, quality content and search marketing will merge in 2013 | Inventer le monde | Scoop.it
JD Rucker : "In May, 2010, Matt Cutts denied that social signals had an effect on search rankings. In December of the same year, he declared that they were actually starting to work in the buzz and signals they were able to get through social media into the site authority factor of their ranking algorithm. Six months later, Google+ was born…

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> JD Rucker/Hasai : http://hasai.com
> Matt Cutts : http://www.mattcutts.com/blog

Via Antonino Militello