Definition of prize pool
The prize pool is the paid seats in a tournament. It is the total prize pool of paid seats. The total prize pool (the total purse) is divided into paid seats. The term "prize pool" is only used in tournament-style poker (sit 'n' go, shootout, tournaments, etc.). The structures of the different tournaments vary. Some tournaments will have 50% of the seats paid, meaning that 50% of the players entering the tournament will have a paid seat; some tournaments will have 30% of the seats paid and others 20%. There are even some tournaments that will have only 1 paid seat (this is called "winner-take-all").
Your style should be influenced by the prize pool
We have seen above that there are different types of tournaments that have different payout structures. Your style should be influenced by the payout structure. If 50% of the players are paid as in a double or nothing (DON), you will obviously have to have a much more conservative style than if you are in a winner take all tournament where there is only one winner. Always keep the prize pool structure in mind when playing your tournaments.