Action Points are a house rule instituted by the GM. They are earned by making a Wiki post about something in-game.
Spending an Action Point gives you an additional action on your turn. You can use it for extra movement, an extra use of a Skill, to re-try for a Contract Activation or to re-try any failed Skill Roll, even those that don’t normally allow a retry.
You can only spend one Action Point per turn and you can use them at any point during your turn. You cannot, however, spend them on anyone else’s turn.