→Scanning the code
Open the appropriate app, point the camera at the code and click on the notification link that pops up when the code is recognized.
Apple phones and tablets updated to iOS 11 can scan the code with the camera app. Launch the Camera app, point at the code and look for a notification at the top of the screen. Other QR code apps are available in the app store for older phones and tablets.
Android devices can use Google Lens, available in Assistant if Google Photos in installed. Touch and hold the home button to launch assistant and look for the Lens icon (camera with dot on lower right). Other QR code apps are available in the Play Store.