Dodge is one of the defence options, which involved in Direct Damage mitigation and Damage over Time avoidance. Dodge is applied first from all other defence mechanisms in the game and grants a chance to completely avoid any melee damage or effect targeted on you. Avoid Projectiles acts in same manner, but with ranged projectile attacks.
Ability to Dodge or Avoid Projectiles can be granted by some items or skills.
Dodge and Avoid Projectiles chances capped at 80%.