World of Warcraft (commonly acronymed as WoW) is a massively multiplayer online role-playing game, which is Blizzard Entertainment's fourth released game set in the fantasy  Warcraft universe.The game of World of Warcraft or WoW is set in a fictional world known as Azeroth and later extending to a further world called Outland. In it, players design a  character to play based on a number of starting options, such as the race of character and its type or class. Gameplay primarily consists of completing quests and dungeon runs,  and other in-game activities, in order to obtain rewards which will allow one to improve one's character and equipment in order to be able to complete the more difficult quests  and dungeon runs. Players can also participate in player versus player combat, either in large groups or small team matches.

Over time, a number of additional features and improvements have been added to the game world, such as additional locations to explore. Seasonal and periodical events have also  been added, such as Halloween, Midsummer and regular fishing competitions. Players can also modify their in-game experience through the use of third-party modifications. From  early in the game's development, Blizzard has allowed players to customize their game interface through the use of modifications, also known as mods or add-ons.These mods can help  the player by automating simple tasks, grouping similar spells or abilities together and enhancing the way information about the game environment is presented to the player.