A coupon is a code that may be redeemed for a discount on an item or free delivery. Coupons are not displayed publicly; as a seller, you may create and distribute coupons at your discretion.
You need this to get it done:
Choose the type of discount your coupon is offering: percentage off (you can offer any percentage off the list price of items in your shop), fixed amount off (you can offer a fixed amount off the list price of items in your shop) or free standard delivery.
Create the coupon code to be sent to shoppers which they can enter into their basket at the checkout.
Must contain between 5 and 20 alphanumeric characters (no spaces or punctuation.)
Minimum Purchase Amount (optional)
If you wish, you can enter a minimum purchase amount which the customer must spend in order for the coupon to apply to their basket.