In World of Warcraft, realms are individual servers where players can create and manage their characters. Each realm operates independently, so players on one realm cannot interact with players on another. Realms come in different types: Normal realms focus on player-versus-environment content, PvP realms allow more free player-versus-player combat, RP realms encourage role-playing, and RP-PvP realms combine role-playing with player-versus-player combat. The realm you choose affects your gameplay experience and interactions with other players.