First of all, you need to understand the definition of a coupon. Coupon codes are unique, they have an expiration date, and they can only be used once. Coupons are used for the purpose of online shopping discounts. Using them gives you a good discount on purchases. Go to the Coupons Trench to get the coupon code. In Coupon Trench, you will find popular brand coupons that can be used to get discounts.