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Google indexes public posts from Google+, making them available in search results, both when you are logged in and logged out of Google+. Private posts do not currently show up in Google search. Google+ also indexes all comments made on public posts, which will undeniably hold substantial SEO weight.

Overall, Google+ has a lot of sharing to do about how, exactly, it intends to rank content.

If there is one main takeaway of the implications Google+ has on SEO however, it is that real users, not keyword-and-link-seeking robots, will increasingly rank and share content. highlighted the fact that Facebook usage is actually usurping time spent on the search-based internet. Without a doubt, Google+, with its built-in content aggregators through Sparks, will take us one step further to understanding the Internet not as centered around content, but around relationships.