Use the Google Authenticator APP on your phone to read this QRcode, it configures the APP for you.
Then enter the numeric code it provides above to confirm you have configured it correctly.
In future when you login you will be prompted to provide the changing numeric code.
For IMAP/POP/SMTP you should either choose 'webonly' or add an application password using the above button, because when normal email clients cannot login with the saved password they will usually not prompt you with the URL link.
Or for imap/pop/smtp you can add +code to your password.
You will not need to read the QRcode again unless you create a new code below.
|