A QR code is a type of matrix barcode invented in 1994 by the Japanese automotive company Denso Wave. A barcode is a machine-readable optical label that contains information about the item to which it is attached.
What is a QR code scanner used for?
QR codes are frequently used to track information about products in a supply chain and – because many smartphones have built-in QR readers – they are often used in marketing and advertising campaigns. More recently, they have played a key role in helping to trace coronavirus exposure and slow the spread of the virus.
How do I scan a QR code with my phone?
How to Scan a QR code on an Android Phone
- Open the Camera app on your Android phone. You can open the camera app by swiping up from the bottom of your screen. ...
- Then point your Android phone at the QR code to scan it. ...
- Finally, tap the pop-up banner.
