I can't ask the question that would help me to know the context. For most FB pages I work with, branding exposure is the best that they can hope for, until they start a localised, short-term campaign, e.g. a charity event.
Both Google and Bing claim to track social signals and Google has several patents where they try to assign a value to the individuals who perform the actions (Edges, I presume, for FB). Since neither have named the networks they measure, we have to assume that they would surely include FB and Twitter, at least.
I see that as a very crude methodology when applied to search rankings. I use consistent identities in various networks, but not a single, unique one. For example, WW is the only place where I am known as anallawalla, so I doubt if that activity helps my rankings anywhere (pretty sure I haven't linked it to Google+).