Abilities
From RoR Wiki
Abilities are the primary character actions used in the game. Activated from your ability hot bar or number ("hot") keys, abilities can be used to attack opponents, defend or heal allies, or increase character performance both in and out of combat. Abilities commonly require Action Points to activate. However, some career have abilities that do not require Action Points, and instead have special requirements to activate these abilities. Every ability is different, and frequently has different uses for different situations. Learning your career's abilities and when to best use them is key to mastering combat in Warhammer Online.