QR Codes
QR Codes (Quick Response Codes) are two-dimensional barcodes that can store data such as URLs, text, or contact information in a machine-readable format. They are widely used for quick data transfer via smartphone cameras, enabling applications like mobile payments, marketing, and inventory tracking. Developers implement QR code generation and scanning in apps to facilitate user interactions and data exchange.
Developers should learn QR codes when building apps that require seamless offline-to-online transitions, such as e-commerce, event ticketing, or authentication systems. They are essential for creating contactless solutions in retail, logistics for tracking items, and in marketing campaigns to drive user engagement through scan-to-action features.