You can use the Recovery Code in the event you are unable to log in by using one of the authentication methods you configured. 

After you have enabled your authentication method of choice, as a final step, we generate a Recovery Code for you to use when you have lost your device or cannot access it. 

Keep this code safe, as you will not be shown this code again. 

Once you use this code, your Two-Factor Authentication settings will be reset. You will need to enable 2FA once again in your account in order to continue using it, and in the process, you will be given a new Recovery Code.