Coupons
Add a coupon
Once a product is added to the cart, expand the total amount section and click the 'Add' button next to the Apply Coupon option to apply the coupon.
A pop-up will appear showing all available coupons; choose the desired coupon from the list or you can either enter a coupon code and select that particular coupon. Then proceed to the payment completion process.
You can use either a coupon or a discount for a transaction, but not both at the same time. Only one option is allowed.