PvP Worlds are worlds where players can fight other players (World 2). People go into PvP worlds for a number of different reasons; You can get items that can be sold for a high price, high level of entertainment and adrenaline for some, you will get double experience in PvP worlds, this can be used to get your levels up faster. The only PvP world at this time is world 2, but more PvP worlds could be added at a later date.