To apply a coupon code at Simplysoles.com, you would first need to shop for your desired items and add them to your shopping cart. Once you have selected everything you wish to purchase, navigate to the cart page where you will find a summary of your selected items. There should be a designated area for entering your coupon code, which is typically labeled as "promo code" or "discount code." Carefully enter the code in the provided field and ensure that there are no extra spaces or errors. After entering the code, you may need to click a button to apply it. If the coupon code is valid, you should see the discount reflected in the total amount. If you encounter any issues, it may be helpful to check the terms and conditions associated with the coupon code or look on the website for additional guidance or customer assistance.