Promo codes allow you to display a field for entering a discount coupon when a customer signs in. The promo code can be one-time or reusable, the discount is set as a percentage of the cost of services. It is also possible to use a promotional code to sign up for a paid service for free - for this it is enough to set the discount percentage equal to 100%.
To get started, you need:
1. Generate coupon (s) in the "Promo codes" section;
2. At the 5th step of the settings, in the "Rules for recording and canceling clients" section, check the "Allow entering a promotional code" box.
The functionality is available from the Premium plan.