Kim Kardashian released an ad in December for her brand, Skkn by Kim, that included a QR code. Kardashian is one of many entrepreneurs using QR technology in their marketing strategies. Here's how ...

What is a QR Code? A quick-response code (QR code) is a type of barcode that contains data for a locator, an identifier, and web tracking. QR codes have been around for a long time. They were first ...