Yes of course..thats why they gave it to you in the first place.!!
At the store
Yes, you can use iTunes Gift Card money.
it will be at the bottom of your screen in the app store
Redeeming is entering the code on the card you buy from the store into iTunes. This money is used to buy content from the App Store.
yes
No, to purchase paid content you will need to have money in your Account (from giftcards) or your account attached to a credit card. To purchase free content you do not need to have a credit card or gift card (for example, free apps from the App Store) Just ensure you make an Apple ID through the App Store and not through the iTunes store or else a credit card will be required.
As a consumer, you don't start out with a 'freebee' or credit balance. Most App Store accounts have a credit card attached to them, and are limited only by the credit card's credit limit. If you use an Itunes or App Store gift card, it is a credit based on the value printed on the card. As a developer, you only make money when a paid app sells. You get 70% of the selling price you set. Apple gets the other 30% for hosting the app, approval and quality control and account management.
In the iTunes or App Store apps there is a Redeem button at the bottom of the page which is used to add an iTunes gift card.
An app store code is a code that you redeem when you buy an Itunes gift card, located on the back of the card. The codes can be for any dollar ammount from $15-$200 depending on what the gift card value is. You can buy Itunes gift cards at most retail stores (vons, CVS, etc.)
yes, I'm using them to add balance into the app through top up one of the bets thing to get them at good prices through shops like Mtcgame. It's the best solution for me to send gift cards for my friends
Scrolling to the bottom of the page in the App store reveals a Redeem button which is used to redeem an iTunes Gift Card.