Dexterity measures hand-eye coordination, agility, reflexes, and balance. This ability is the most important one for rogues, but it’s also high on the list for Player Characters who typically wear light armor (rangers and barbarians), medium armor (barbarians), or no armor at all (monks, wizards, and sorcerers), and for anyone who wants to be a skilled archer.
You apply your Player Character’s Dexterity modifier to:
- Ranged attack rolls, including those for attacks made with bows, crossbows, throwing axes, and other ranged and thrown weaponss.
- Armor Class (AC), provided that the character can react to the attack.
- Reflex saving throws, for avoiding fireballs and other attacks that you can escape by moving quickly.
- Balance, Hide, Move Silently, Open Lock and Tumble checks. These are the skills that have Dexterity as their key ability.