What is the recovery key for a MacBook Air

Is that the exact term? I am only familiar with that term in this context:

How to generate a recovery key --> https://support.apple.com/HT208072

With two-factor authentication and an Apple device, you have the option to generate a recovery key to help improve account security.

- Creating a recovery key turns off account recovery. Using a recovery key is more secure, but it means that you’re responsible for maintaining access to your trusted devices and your recovery key. If you lose both of these items, you could be locked out of your account permanently.

A recovery key isn't required with two-factor authentication, but using one gives you more control over the security of your Apple ID. When you generate a new recovery key, you turn off other account recovery methods. Then the only way to reset your password or regain access to your account is to use your recovery key.