I find it very useful for keeping up with those old friends or acquaintances you don't really talk to anymore but still want to "know". Its enabled me to keep in touch with several teachers from school and other people I would have likely lost touch with. I hardly ever post on it, but I message people alot. It is also great for musicians, artists etc. But for posting what your doing every second of the day, that's BS, no one cares, I hate those people.