A Quick Response code, more often known as a QR code, is a square-shaped, two-dimensional (2D) barcode that can be read by smartphones. You can make a phone call, send a message or email, access a website, or even be sent to a location using the information included in a QR code.
A QR Code can encode up to 4296 characters or 7089 digits, allowing it to store vast quantities of material.