World of Warcraft is not an anime series; it's a massively multiplayer online role-playing game (MMORPG) developed by Blizzard Entertainment. Released in 2004, it is set in the fantasy world of Azeroth and allows players to explore, complete quests, and engage in player-versus-player combat. The game has been highly influential in the gaming industry and has a dedicated fanbase, with numerous expansions released over the years.