Welcome to the Q&A Forum

Hi there The question is two-fold, so let's look at it in bits. First - Google+ may pass SEO value to your site, just as any other website would.  This is because Google+ pages can accrue PageRank and also pass it on - the links in the "about" section of a business page, for example, are dofollow, which passes PageRank or SEO equity. Second of all, Google+ already has a big influence in organic search in a few other ways - and this is likely to get bigger over time.  We have seen people being able to link to their website with the rel=author tag - which links the website with a Google+ profile.  This creates a rich snippet in the organic search results, a small picture of the contributor's profile, which has been tested to show an increase in click-through rate in the SERPs.  So that's one way. The second is personalised search.  People logged into their Google accounts will be served personalised search engine results.  This could be based on their previous browsing history, pages that they have "+1'", friends that have "+1"'d pages and probably more factors in the future.  This can have a massive shift in how organic search appears and therefore makes Google accounts and Google+ a significant influencer. I would start engaging more and more with your Google+ account.  Get involved with Google+ community pages to start getting more followers to your own account and start being active and promoting your business pages too.  Engage with your audience, take part of the Hangouts feature and start adding +1s and followers to your page.  Link up your personal profile to your blog posts with the "rel=author" schema tag to improve click through rate on these posts.  The stronger your profile and business page are, then it's most likely the stronger the influence they will have in organic search. Hope this answers your questions!

Extensive discussion on this topic in the link below: http://www.webmasterworld.com/google/4550136.htm