In order to manage well the discount codes you create, you have the All Coupons section that helps you to stay updated and know when a coupon has expired or if it is going to expire soon so you can ensure good communication with your customers. You also have the possibility to edit or delete a coupon from this page.
Here is what this part looks like:
You have all the information you need to update your coupons and manage them, you will find the number of times the coupon has been used, the date of creation and expiration, and also its usage limit so when you have an issue or a customer can not use a coupon, you will easily know why.