What is a QR Code and how to I use it?

A QR code, short for Quick Response code, is a two-dimensional barcode that can be read using a QR code scanner or the camera of a smartphone, tablet, or other digital devices. QR codes can store various types of data, such as website URLs, text, contact information, Wi-Fi credentials, and more. They are commonly used for marketing purposes, ticketing, payments, product tracking, and accessing information quickly and conveniently. QR codes are made up of black squares arranged on a white square grid, and they can encode data horizontally and vertically, allowing for the storage of large amounts of information in a relatively small space.