A coupon code, also called a promo code or discount code, is a string of letters and numbers that shoppers enter at online checkout to claim a discount on a purchase. Codes are typed into a promotional box on a site’s shopping cart (or checkout page) and apply savings such as a percentage off, a fixed amount off, or free shipping. The terms coupon code, promo code, and discount code are used interchangeably, though some retailers reserve “promo code” for limited-time campaigns.
Types of Coupon Codes
Most coupon codes deliver one of a few common discount types:
- Percentage discount: a set percentage off the order or selected items
- Fixed-amount discount: a flat sum off, for example, $10 off a $50 order
- Free shipping: removes delivery charges at checkout
- Free gift or BOGO: adds a free item or a buy-one-get-one offer
Depending on the merchant, the same mechanism may be labeled a promotional code, an offer code, a gift code, or a digital coupon.
How to Use a Coupon Code
To redeem a coupon code, add items to your cart, open the checkout or shopping cart page, paste the code into the field labeled “promo code,” “discount code,” or “coupon,” and apply it before paying. The order total updates to show the discount. Codes can be case-sensitive and often carry conditions, such as a minimum spend, an expiry date, or eligibility on selected items only.
Where to Find Coupon Codes
Coupon codes are distributed through several channels:
- Merchant email newsletters and loyalty programs
- Brand social media accounts and retail blog posts
- Affiliate and referral links, where the discount is applied automatically when you click through
- Coupon aggregator sites such as Coupons.com, CouponCabin, and RetailMeNot, which collect thousands of current codes in one place
- Sector-specific roundups, for example, crypto gambling promo codes, which track current bonus codes for a single industry
Some sites let you copy and paste the code into the merchant’s cart, while others apply it automatically through a referral link.
Why Merchants Offer Coupon Codes
Online merchants use coupon codes to incentivize purchases, reward loyalty, and recover abandoned carts. Many do not publish codes on their own site, instead placing them in affiliate programs or member-only newsletters so they can track which campaign or partner drove the sale.
