The World Tag Team Championship is the name given to a number of unrelated professional wrestling tag team (multi-wrestler team) titles.
Despite the name, the territorial nature of early professional wrestling meant that few promotions could actually claim the "World" part of the title, in the sense that the title could potentially be defended against any challenger anywhere in the world. Thus, few belts are considered to be "world championship" belts.
The presence of a title considered to be a World Tag Team Championship is one of the factors that makes its promotion one of the major promotions in professional wrestling. However, it is to be noted that numerous major promotions have top championships that are not considered world championships, and the presence of a world championship in a promotion's shows does not instantly make a promotion a major one, as a World Tag Team Championship may be shared between several promotions.
Due to the variations of team wrestling other World Tag Team Championships may remove the "Tag Team" and replace it with a more suitable term (as in "Trios" or "Six-Man Tag" to reflect a three-wrestler tag team). The name of the promotion is often prepended to the phrase "World Tag Team Championship" as the championship's complete name (as in the WCW World Tag Team, or ECW World Tag Team Championships) - however some are correctly known simply as the "World Tag Team Championship" without qualification, possibly because they are competed for in promotions where another Tag Team Championship is present (as is the case of World Wrestling Entertainment today).
