Why implement Google’s +1 button? Well, if it brought more website visitors from Google search, that would be reason enough. But does it?
To do this it must influence search engine rankings (or SERP) for Google.
Does Google’s +1 (plus-one) Button Affect SERP?
Google have stated that people clicking on the +1 button . . . → Read More: Why Implement Google’s +1 (plus-one) Button?