QR codes (Quick Response codes) are two-dimensional barcodes that can store data like URLs, text, or contact information. Unlike traditional barcodes, which only store data horizontally, QR codes can hold much more information by encoding it both horizontally and vertically. They are easy to scan with a smartphone or QR reader, making them widely used for quick access to websites, digital payments, event tickets, and more. With their increasing use in marketing and everyday transactions, QR codes have become an essential tool for connecting the physical and digital worlds.