Exactly what is Twitter?

[ISee]

Just wondering,
What exactly is Twitter? I mean what exactly do you do lol.
I think I'm misunderstanding a lot of the things my friends are telling me about it.
I'm trying to give you guys a bit more of what i'm asking but lol i don't know how to word it exactly.
I just wanna know, what actually goes on when on Twitter..... Like ppl ask stuff and you answer (like Y!A) Or like someone starts a subject and lots of other ppl join in or... What?
What about this "follow" thing?
My friends keep saying..."If you get one make sure you follow me!"
And i'm like wha?

[superihte]

Basically, you just type on your ''Twitter Wall'' the thing you're doing at the moment, and then other people write comments on it, and yeah it's basically like a ''I am doing this'' thing...

[ready to laugh :D]

You type what you are doing, have done, or will do. It then leads to lack of natural interactions with other humans and then we all stop existing because we can't even tell another person, "Let's have sex."