A Quick Response (QR) Code is a two-dimensional barcode that can be read by smartphones and other devices with cameras. The code consists of black and white squares arranged in a square grid. The data encoded in the QR code can be anything, such as a URL, text, or contact information.QR codes are becoming increasingly popular as they offer a quick and easy way to share information.For example, if you see a QR code on a poster for an event, you can scan the code with your phone to get more information about the event without having to type in a long URL.There are many free QR Code readers available for download from app stores, so there's no excuse not to start using them.