Twitter is similar to Facebook. People subscribe to your account and when you tweet it sends it out to them. Your account like FB can be set to private if not you're tweets are public. The plus side to Twitter is text is short, 140 characters unless its in a private message, so you won't get huge long paragraphs to read. The plus to Twitter is as you know Facebook plays a lot of games as to what messages your friends may or may not see, Twitter doesn't do that. You will see everything they post. I don't think you'll see as much advertizing or garbage stuff either.
