What Is a QR Code? A Simple Guide
A QR code is a two-dimensional barcode that a phone camera can read. It can open a website, show text, save contact information, or help someone join a Wi-Fi network.
How QR codes work
The black and white squares hold encoded information. A scanner reads the pattern and turns it back into the original link or message.
Common uses
Businesses use QR codes on packaging, restaurant menus, posters, receipts and business cards. They reduce typing and make printed information interactive.
Static and dynamic codes
Static QR codes keep the information inside the image. Dynamic QR codes redirect through a service and can be edited later, but normally need a database and subscription.