A cashback coupon is a promotional offer where customers receive a percentage of their purchase amount back after buying a product. Instead of an instant discount at checkout, the cashback is usually credited to a user’s account, wallet, or bank after the transaction. For example, a $50 order with a 10% cashback coupon would return $5 post-purchase. This incentive encourages spending while giving customers a delayed reward, often redeemable on future purchases or through partner platforms.