Don't know what to do with that iTunes Gift Card you were given? Let iMore help you out!
An iTunes gift card can be a little deceiving because it's not just for the iTunes Store like the name implies. In fact, when you redeem an iTunes gift card it adds the amount to your Apple ID as a redeemable credit, so you can use that money in the App store, iTunes store, and the iBooks store. This gives you a ton of choices on how to spend that gift card, which may sound a little daunting, but don't worry I'm here to help.
Full story from the iMore Blog...