Here are the steps on how to use Promo Codes when shopping at potterybarn.com: Add your favorite items to the shopping cart, then click to log in or create a new account, then go back to the shopping cart interface of potterybarn.com and select the items you want to buy. Then place an order, click the Coupon Codes obtained on the settlement page, you will automatically jump to the existing Coupon Codes page, select the Coupons you want to use, and complete the payment.