Welcome to IRC. You can just go through all the threads before you start posting here. Particularly the sticky threads and other announcements.
You have just asked generally and so I am also telling you like this. If you want to know anything in particular just ask, one of us will come out with the answer. You can be sure of an immediate reply from either me or Rajmi.
You have been using some of the products at home or seen them at your friends place or you would have heard of them. For those products you can write reviews. That's the first thing you can do here. You can earn points as well as cash credits for the reviews marked under $ signs.
All the best
Editor - IRC
India Review Channel