I am not a SEO guru. No way, not even by a long shot. However I don't see the connection between social media and SEO strategy. SEO, the last I checked, is what you do to your site. Social media doesn't do anything to your site. The only connection between the two is rather tenous. With proper use of social media, you can get more people to visit your site. With proper use of SEO, you can also get more people to visit your site. But I don't see how social media plays any kind of role in SEO.