There are several potential reasons why your promo code may not have been successful:
The code may not be applicable to the items you selected. Sometimes promo codes are specific to certain products, like sandals versus sneakers.
The code might require a minimum cart value. Certain promotions only become valid once you've reached a specified spending threshold.
The item you're interested in may already be on sale. Typically, discount codes cannot be combined with items that are already discounted.
The code could be expired. Unfortunately, coupons do have expiration dates, and while we endeavor to monitor and update them regularly, occasionally they may expire unnoticed. If you encounter an expired code, please notify us, and we'll address it promptly.