A Listly List - Quick Response (QR) codes, those small black and white graphics that resemble a square bar code, have become a vital tool in the digital marketing toolbox. With smartphones now a ubiquitous part of everyday life, QR codes offer a seamless link between physical and online marketing. - Ensure Visibility, Top Tips and Tricks for Using QR Codes Effectively, Customize as per Brand, Print QR Codes, and Add Direct Link