QR code (short for Quick Response code) is a type of two-dimensional barcode that can be read by a smartphone or a specialized QR code reader. QR codes can store much more information than traditional barcodes, including website links, text, email addresses, and even entire online transactions. When scanned, QR codes can automatically direct users to a website, display product information, or provide other useful information. QR codes are increasingly used in marketing campaigns, product packaging, and other industries where quick and easy access to digital information is required.