re: Poker & Different kind of Bonus?
The most common type of bonus is a first deposit bonus, basically if you sign up and deposit $xx the site will (for example) match your deposit, so you will have $xx x 2 after you have played X raked hands.
Another type is a reload bonus, which is the same as a first deposit bonus, except it's for people who have already made a first deposit and are looking to re-deposit again.
Other types include no deposit bonuses (e.g. the one featured in the banner on the homepage).