Adding a coupon or discount code is easy.
First, click on Campaigns >> Coupons
Second, click on “New Coupon”.
When the modal displays, select the Campaigns and Product(s) of which the coupon should apply to. Give the coupon a name for display purposes, then set if you want the coupon to be a Percentage or Flat-Amount off the product price. Then choose if you want the coupon to apply one-time or recurring (for subscriptions only).
Then give the discount code a unique code that the customer will use at checkout. Enter the percentage or price that will discount from the normal product price.
Optionally you can choose a start and end date that the coupon will be active. You can also choose if you want the code to apply to the first transaction/charge, future rebills or all transactions.
Once your coupon code is active, your checkout page will now have a “Enter Coupon” button on it, that will allow the customer to enter their coupon code and apply the discount you specified.