TWITTER - I don't get it

Image via Wikipedia

O.k., I'm way under the learning curve on the subject of Twitter......

I have an account - whoopee!  So now what?

I can post my writing efforts there by just clicking on the icon but so what?  Do I have to have a ready-made audience who'll read, retweet, or what?

I don't know - I just don't get it!
Tweet!!!