One card, millions of ways to enjoy it. Use the App Store & iTunes Gift Card to get apps, games, music, movies and TV shows. Available in a variety of denominations - spend it on in-app content, books, TV show subscriptions or even iCloud storage to secure files from all your Apple devices.
App Store & iTunes Gift Cards are solely for the purchase of goods and services on the iTunes Store, Apple Books, Apple Music, and the App Store.
App Store & iTunes Gift Cards and Apple Music Gift Cards are specific to your country or region. If you’re trying to redeem an App Store & iTunes Gift Card or Apple Music Gift Card that was purchased in a different country or region, make sure that you’re redeeming it in the iTunes Store for the same country or region.
More info here: Gift Card FAQs