Persuasion is the art of convincing someone to do what you want through the use of words and gestures. This does not include persuasion through threats or force (that is covered by Intimidation) or by lying (covered by Deception).
Use Persuasion any time you are trying to bargain with, convince, or manipulate someone. This can include motivating your subordinates or peers to take action, seducing a companion, winning a political debate, or negotiating a contract, among other things. Persuasion is handled as an Opposed Test against the target’s WIL + WIL + SAV when one person is simply trying to win over another. If both parties are trying to convince each other, make it an Opposed Test between Persuasion skills.
Example (optional) specializations include Diplomacy, Morale Boosting, Negotiating, Seduction.