A set is a group of items with similar properties that, when combined, give an overall set bonus. Typically, these bonuses are added when there are two or more pieces of the set equipped, and each subsequent bonus stacks with the one before it. This article is in need of attention. ...
For example, in World of Warcraft, the "Black Dragon Mail" [1] set gives: World of Warcraft (commonly abbreviated as WoW) is a race/class-based massively multiplayer online role-playing game (MMORPG) developed by Blizzard Entertainment. ...
Improves your chance to hit by 1% with two items
Improves your chance to get a critical strike by 2% with three items
+10 Fire Resistance with four items
Theforefore, if a player had all four pieces, they would receive the chance to hit, critical strike and fire resistance bonus.
Sets can range anywhere from 2 pieces to upwards of 8 or 10, depending on the game and the available equipment slots. Also, as well as improved bonuses, item sets usually have a distinct look to them, through use of unique game artwork.