To redeem a coupon or promotional code at Pajamagram.com, a customer should first visit the website and browse through the selection of products. Once a chosen item is placed in the shopping cart, the customer should proceed to the checkout page. During the checkout process, there will typically be a dedicated field labeled "Promo Code" or "Coupon Code." The customer simply needs to enter the code exactly as it appears, making sure to check for any spaces or special characters. After entering the code, it is important to click on the "Apply" button to ensure the discount is applied to the order total. If the code has been entered correctly and is valid, the discount will be reflected in the order summary. Should the coupon code fail to work, it may be a good idea to double-check the terms and conditions associated with that particular code or consult the frequently asked questions section on the Pajamagram website for additional details.