Why Implement Google’s +1 (plus-one) Button?

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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?