To apply a promo code during the checkout process on Rockport.com, first, you will want to add the items you wish to purchase to your shopping cart. Once you are ready to proceed to checkout, navigate to the shopping cart page. There, you will typically find a section labeled "Promo Code" or "Discount Code." Enter your promo code into this designated field. It is important to ensure that you type the code exactly as it is provided, including any capital letters or special characters, as they can be case sensitive. After entering the code, you will want to click the “Apply” button to see if the discount is successfully applied to your order total. If the promo code is valid, you should see the adjusted price reflected in your cart before finalizing the purchase. If you do not see the discount applied, check the terms and conditions of your promo code to ensure it is still valid and applicable to your selected items.