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What a QR code is and how to use it
QR codes (Quick Response codes) are two-dimensional barcodes that store text, links, contact details and other data. A phone camera or scanner can read them instantly.
How a QR code works
A QR code is a pattern of black and white squares. A camera or scanner decodes the pattern and shows the text or opens the link.
Why QR codes are useful
QR codes transfer information quickly, without typing. They work for links, text, addresses and contact data in retail, marketing, logistics and apps.