To use "Watches of America" promo codes, follow these steps: 1. Go to the "Watches of America" site and add items to your shopping cart. 2. On the "Watches of America" coupon codes page, click on the Get Code button and copy the promo code. 3. Enter the copied coupon code into the Promo Code box and click Apply. The discount will be applied to your entire order. Remember, each promo code may have its own terms and conditions, so make sure to read them before applying the code. If the code doesn't work, it might be expired or not applicable to the items in your cart. If you have any issues, it's best to contact "Watches of America" customer service for assistance.