You need to scan the QR code shown on the site using your mobile phone (or tablet) and perform the required actions on your device.
In order to be able to scan the code, use the camera of your phone. For Apple phones, no additional software is required (just point the camera at the QR code and follow the instructions). Most Android-based phones also do not require third-party programs.
For those who have problems, we recommend a program for reading QR codes Privacy Friendly QR Scanner (we are not affiliated with this software, but tested this application and it performs the necessary functions).
You can download it from google play.