Amazon Gift Cards are prepaid cards that can be used to purchase items on the Amazon website. They come in various denominations and can be bought online or in physical stores. Recipients can redeem the card by entering the unique code during checkout, making it a convenient gift option. These gift cards can be sent via email, printed at home, or delivered in a physical format. They do not expire and can be used for a wide range of products, including books, electronics, and household items, providing flexibility for the recipient to choose what they want.