One of the most common realities we work with the almost total separation of organic SEO and social media within marketing departments.This is tragic because social media marketing should be one of the most valued allies of SEO.
Below are the ways social media can help SEO.
if your business is big enough to have separate people (or even teams) working on search and social, do everything you can to get them working cooperatively.
it is highly unlikely that the major search engines currently use mentions or amount of engagement around a brand or piece of content as a direct ranking signal.