^ Depending on who you follow and how you use it, it can either be a complete waste of time, or an excellent Primary news-source.
For example; I follow several professional fighters, many of which are excited to post who they are fighting next and when and where.
Rather than waiting for or searching through blogs for that information (when they almost always get something wrong or embellish facts for entertainment purposes) I have the direct source.
It's also good for some novelty fun, in the aspect of talking to celebrities. I've had several celebrities correspond with me on more than one occasion. BJ Penn sent a funny response to a question I asked him once, Paulie Malignaggi is always chatting back/forth with followers, RJD2 inquisited me about some music I compared to his.
It's worth checking out.
Follow me @NoodlesRap and i'll follow back. You can DM me with any questions.