Discounts can be applied to purchases at the point of sale. You can apply a dollar value or percentage discount to an individual item in a client's shopping cart, or you can enter a discount code which will apply to all applicable items in the cart.
Applying a discount at checkout | WellnessLiving
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Use a promo code
1. At the bottom of the checkout screen, look for "Add a promo code."
2. Enter your code.
3. Click or tap Apply. If you added a new address, credit card, or email address, the page might reload. If this happens, enter the details again.
4. Complete your purchase.
Use a promo code - Google Store Help support.google.com > store > answer
A discount coupon is basically a code that a customer can enter at checkout and get a discount on their order. ... When a coupon is applied at the checkout, the discount amount is deducted from the order subtotal — a total cost of all items in the cart excluding taxes and shipping.
Discount coupons – Ecwid Help Center
support.ecwid.com > en-us > articles > 207806525-Discount-coupons