The place to provide a coupon code should be easily findable. It should be close to the payment information, hierarchically above or before the checkout button.
How to apply discount code at checkout?
Desktop/Tablet: Once on the checkout payment page, you will find a Discount Code box to enter the code on the right-hand side of the screen with the text 'Add a discount code or a gift card'. Enter your code and click apply for the discount to automatically be applied to your order.
How do voucher codes work?
A discount code or voucher code is simply a combination of numbers and letters, which usually partially describe the offer or discount in some way. Particular brands will enjoy a set discount for a period of time, and so the voucher can be used to obtain this money off.
Do discount codes ever work?
On average, coupon/promo codes work only about a third of the time, says Walt Roloson, co-founder of Wikibuy (owned by Capital One), a popular online shopping browser extension that finds and applies coupon codes during checkout.