I honestly often hear about the "demo scene" being talked about but I've never even once seen anything in the real world. I might see a youtube video or two but I would have 0 clue on:

1) What is it for?

2) Where does it happen?

3) What's the goal? (not in a snarky way but in what do the sceners pursue?)

4) How does one get to know about the demo scene? How does one "join"?

I'm impressed by how something that seem so hidden, but also talked about, but also hard to catch still exists.

I guess I'm just a noob out of the loop but I'm curious :)

EDIT: Or maybe I am so out of the loop not to know it's mainly a thing of the past?