Tier

Tier has two common meanings in World of Warcraft.

Armor
All classes in World of Warcraft have unique armor sets designed specifically for their own usage. Armor sets obtained through raiding are designated by tier.

For more information, see Armor set, and individual tier articles: Tier 1, Tier 2, Tier 3, Tier 4, Tier 5, Tier 6, Tier 7 heroes' and valorous, Tier 8 valorous and conqueror's, Tier 9 conquest and triumph, Tier 10.

Tier 11.

Talent trees
Talent trees are arranged into tiers, with higher tiers requiring more talent points.