What are Facebook Credits?
Facebook Credits are a virtual currency you can use to buy virtual goods in all games on the Facebook platform. You can purchase Facebook Credits using your credit card, PayPal, a mobile phone and many other alternative payment methods. To buy Facebook Credits or check your balance, go to the Payments tab in your Account Settings.
Your balance is also displayed in the Facebook Games Dashboard.
You can purchase credits from the Games Dashboard as well as directly in all the games on the Facebook platform.