QR, short for Quick Response, is a type of two-dimensional barcode that is widely used for storing and retrieving information. It consists of a matrix of black and white squares, which can be scanned by a smartphone or other device equipped with a QR code reader. This technology allows for quick and easy access to information, such as website URLs, product details, and contact information, making it a popular tool for marketing, advertising, and inventory management. With its ability to store large amounts of data and its widespread use in various industries, QR codes have become an essential part of our digital world, providing a convenient and efficient way to access information on the go.