What is Armor ?

Armor is a stat in Dota 2 that reduces physical damage taken. The higher the armor value, the less damage a hero takes from autoattacks and physical abilities.

Armor can be increased through stats, items, auras, and abilities. It is especially important for frontline heroes, as it helps them survive battles against heroes with high physical damage. However, armor does not affect magical or pure damage, so for full protection, other forms of resistance should also be considered.

Each point of agility increases armor by 0.167 (1/6). The total amount of physical damage a unit can take due to the armor it has is known as Effective HP.