Discount coupons as a marketing tool for your online shopping cart is a great way to encourage new users to buy from your store, or to give incentives to first time buyers to come back for more.
You can issue coupons that give free shipping, or either %-discount or fixed-amount discount on an order.
You can set a lower order threshold for the coupon to be valid.
You can limit the usage of a coupon code to 1 time per customer account and/or a maximum number of times the coupon can be used (by any customer).
You can limit the coupon to only be valid for a certain product.
And you can use the tool for campain planning by setting up start date and end date for the coupon offer.
You get all of this for only $10 + GST monthly, meaning this should an easy money maker for your business.