I scan QR codes whenever I need to link my phone to my Google account via the Google Authenticator app. Outside of that I think I have scanned a QR code exactl

I scan QR codes whenever I need to link my phone to my Google account via the Google Authenticator app. Outside of that I think I have scanned a QR code exactly one time - it was on a menu in a restaurant and scanning the code brought up coupons.