The technology that underpins the use of QR codes for marketing and information sharing is primarily based on matrix barcode technology. QR codes can store a variety of data types, including URLs, text, and contact information. They enable quick and easy access to digital content through mobile devices equipped with cameras. By scanning a QR code, users can instantly obtain product information or promotional offers, making it an effective tool for engaging customers and enhancing their experience. This simplicity and efficiency contribute to their widespread adoption in various marketing strategies.