this is what it does: It provides the necessary software to support a private, possibly semi-secure, social network. Think: Facebook, but small and secret, presumably to protect your membership from an oppressive large authority.
(this post is a traditional trick to get someone who actually can answer this sensible question to become so enraged by this incorrect reply that their activation energy is achieved and we get a good answer. so take what i've written up there as false bait. (this works particularly well when one wants a clear definition to obscure technical terms. just get yourself on a Haskell board, and write: "monads? simple! they're factory objects that provide closures for a formal lambda expression" then watch the horror and outrage and eventually you get the correct answer from the former lurker class))