"There's a lot of buzz in SEO about social media and its impact on SEO. True, some sites, like LinkedIn get indexed in Google's search engine.
That’s because Google is allowed to crawl LinkedIn’s discussion boards and Q&A section and index the stuff it finds there. Great. It’s a hidden benefit if you are willing to spend a little time optimizing post titles and your profile.
Notice that none of that, though, is being “social.” When you try optimizing post titles for SEO purposes, you typically end up thinking “what would Google like?” instead of “how do I contribute to this conversation (or, alternatively, how to I start an engaging conversation)?”
Posting good SEO titles doesn’t always equate to posting good conversation starters".