A coupon QR code opens a mobile offer page after a customer scans it. The page can show your company, discount headline, offer description, coupon code or uploaded barcode, expiration date, terms and conditions, and a button to continue to an online destination.
The QR code is the entry point, not the validation system. A phone camera can open the coupon page, but acceptance at checkout depends on the rules and tools used by the merchant. If the offer requires one-time use, customer eligibility, inventory checks, or a unique code per recipient, connect the campaign to a checkout, POS, loyalty, or coupon platform that enforces those rules.
A coupon QR code is also different from a generic coupon scanner. QR-Build helps you create and present your own coupon campaign. It does not identify, price, or validate arbitrary third-party coupons and barcodes.