Facebook Credits are a virtual currency you can use to buy virtual goods in any games or apps of the Facebook platform that accept payments. You can purchase Facebook Credits directly from within an app using your credit card, PayPal, mobile phone and many other local payment methods.
To check your balance or to buy Facebook Credits for later use in an app, go to the Payments tab in your Account Settings. Click the "Buy More" link next to "Credits Balance" to purchase Facebook Credits.

Your balance is also displayed in the Facebook games panel, which is visible on the right hand side of your screen once you launch an app.

You can also purchase Facebook Credits from the games panel by clicking the "Get More" link.
To check your balance or to buy Facebook Credits for later use in an app, go to the Payments tab in your Account Settings. Click the "Buy More" link next to "Credits Balance" to purchase Facebook Credits.

Your balance is also displayed in the Facebook games panel, which is visible on the right hand side of your screen once you launch an app.

You can also purchase Facebook Credits from the games panel by clicking the "Get More" link.