Quick Response (QR) code is a type of two-dimensional barcode that can store a variety of information, such as URLs, contact details, or payment information. QR codes can be scanned by smartphones or other devices equipped with a camera and QR code reader software. They are widely used in marketing, ticketing, contactless payments, and product labeling. Unlike traditional barcodes, which are one-dimensional and store only numeric data, QR codes can encode alphanumeric information, making them more versatile. QR codes have gained popularity due to their ease of use, fast scanning, and ability to link to digital content instantly.