After purchasing you will get an email with a unique code that will be used to redeem when ready.  

Assuming you are buying a gift card for someone else, you could either print or forward the gift card email to the recipient.

When making a purchase in the store, you can redeem the value of a gift card by entering its unique code at checkout. A gift card holds a balance, which can be spent over more than one order.

When you are redeeming a gift card, the checkout will display one of two options:

• If the balance available on the gift card is greater than or equal to the order total, then you can click Complete Order.

• If the balance available on the gift card is less than the order total, then you will be prompted to choose a second payment method for the balance before placing the order.