QR codes (Quick Response codes) are two-dimensional barcodes that can be scanned and read by smartphones, tablets, and other devices with QR code reader apps installed. They were originally developed in Japan for the automotive industry to track car parts, but have since become widely used in advertising, marketing, and other industries.
QR codes can store a large amount of information, such as URLs, contact information, product details, and more. They consist of black and white squares arranged on a square grid and can be easily scanned by a camera on a mobile device. When scanned, the code is decoded and the information stored within the code is displayed on the device screen or used to perform a specific action, such as opening a website or launching an app.
QR codes have become increasingly popular in recent years as they provide a quick and convenient way for consumers to access information or take action, such as making a purchase, without the need for typing in a web address or searching for a specific product.