what do u do in it,how do you play it and what is it like because all my friends dont have it

it's a MMORPG (http://en.wikipedia.org/wiki/Mmorpg). if you've played any other MMORPGs, it should be quite familiar. if you haven't, it may take a bit of adjusting to, but it's basically just a roleplaying game that isn't nearly as linear as traditional games, and allows for a lot of multiplayer interaction.