Twitter is pretty great. Within a matter of minutes, you can get the latest news, sports, opinions, memes, advice, celebrity junk, and more. Ever wanted to chat up Russell Crowe, Pope Francis, or the drummer from Kings of Leon? They're all there!
It has great business applications as well. It's a quick way to reach a crowd or get connected to powerful people.
And as useful as Twitter is as a broadcasting and connection tool, it's even better for reading and learning.