With custom discounts, you can allow your shoppers to apply discounts from external services to their purchases. To apply custom discounts to carts and cart items, you need to set
custom_discounts_enabled field to
true in your Update Cart Settings.
You cannot add custom discounts to an empty cart.
- You can apply up to five custom discounts to cart and cart item.
- The stores that use simple calculation method do not support custom discounts.