Dexterity:

Your character's dexterity is a the control he has over his movement. It's his nimbleness and reflexes. A character with a high dexterity may be sneaky, good at dodging, be built like a dancer, etc.. Dexterity is also used in determining who acts first in combat. Players who anticipate a lot of ranged combat and stealth should take a high dexterity score. Wearing heavy armour or carrying heavy loads can impose penalties to dexterity skills.