Affect of Google Plus One on SEO
Social interaction is enormous, and Google has worked hard to catch up with rival Facebook. With the found of Google Plus google have a powerful new tool that will soon allow Google users to share their sites and their content as like Facebook users are now doing with Like button.
Right now, +1 button is used for search. If you search for "SEO training" and decide on the fourth or fifth page of search results are better than the first, you can +1 that ranking, basically telling Google “this search result is the best for this keyword”. 'It is powerful and Google wants to integrate these results into their search rankings.