An iTunes gift card is the card you purchase at most any store to make purchases in the iTunes Store without using a credit card. The gift code is the code on the back of the card that you enter to redeem the card to put the amount in your iTunes account.
Beside this, what is Itune and what does it do?
It is used to play, download, and organize digital multimedia files, including music and video, on personal computers running the macOS and Windows operating systems. Content must be purchased through the iTunes Store, whereas iTunes is the software letting users manage their purchases.
What is an Amazon credit card?
Amazon Credit Card[*] The Amazon Credit Card, also known as the Amazon Rewards Visa, offers 3% back on Amazon purchases, 2% back at gas stations, restaurants and drugstores, and 1% back on everything else. Though you can use the card anywhere that takes Visa, rewards are redeemable only at Amazon.