To set up a Google backup code, you must first ensure that you have a Google account. If you don’t already have a Google account, you can create one by following the steps on the Google sign-up page.

Once you have a Google account, you can set up a backup code as follows:

• Go to your Google account. You can do this by going to the Google homepage and clicking “Sign in“. Then enter your credentials and log in.
• Click your profile picture or the circle icon containing your initial in the top right corner of the Google homepage. A drop-down menu will appear.
• Select “Google Account” from the drop down menu. This will take you to the Account Summary page.
• On the Account Summary page, look for the Security section and click on it.
• In the “Security” section, scroll down and look for the “2-step verification” option. Click on it.
• You may be asked to re-enter your Google password to continue.
• On the 2-Step Verification page, you’ll see various options for setting up two-factor authentication. Select the “Backup Codes” option.
• Click “Generate Codes” or a similar button. Google will generate a list of several backup codes for you.
• Save these backup codes in a safe place. You can write them down or save them in a password manager app. You will need these codes if you don’t have access to your device or your usual authentication methods.
• Once you have saved the backup codes, click “Next” or a similar button to complete the setup process.

see fig. (click to enlarge)

That’s it! You have now set up a Google backup code that you can use to access your Google account if you don’t have access to your usual means of authentication. Make sure you keep the backup codes safe and don’t lose them!