Shopify gift cards work by allowing customers to purchase and redeem them on Shopify-powered online stores. When a customer buys a gift card, they receive a unique code that can be used as payment during checkout. The gift card code can be entered in the “Gift card or discount code” field at the checkout page, and the value of the gift card will be applied towards the total order amount. If the order total exceeds the gift card value, the customer can pay the remaining balance using other payment methods. Gift cards can be used multiple times until the balance is fully used or expired. Shopify gift cards can be a great way to attract and retain customers, as well as increase sales on your online store.