What is QR code and what does it do?

A QR code is a type of barcode that can be easily read by a digital device and stores information as a series of pixels in a square grid. QR codes can store about 7,000 digits, or about 4,000 characters, including punctuation and special characters.

How to scan a QR code?

Open Google Camera. Choose a scanning option: To scan with QR mode in Google’s Camera app, tap the QR icon and hold your camera up to a QR code. To scan with your camera’s default photo mode, hold your camera up to a QR code.