pinter...what?

Lately everyone seems to be obsessed with this Pinterest thing.

Am I behind on the times or something because I have no clue what it is, or how to work it.

I requested an invite just because everyone seems to love it, and I'm curious.

But I honestly have absolutely no idea what it is. And I would love to have some clue as to what I'm using when I start.

Would anyone care to enlighten me?

I would very much appreciate it.