We have covered some of the methods 2FA can be implemented such as using authenticator apps and SMS text messages. These methods are vulnerable to man-in-the-middle attacks where an attacker can intercept SMS messages to obtain your verification code. Which is why we will be explaining a different method of 2FA.
Another method in which 2FA can be implemented is called Universal 2nd Factor (U2F). U2F was developed by Google and Yubico, the maker of hardware devices used as an authentication key known as Yubikeys. U2F uses physical hardware devices such as a USB or NFC which can be used to login to your account after you provide your email and password.
To learn more about U2F devices such as the Yubikeys, here is a link to how Yubico describes the importance of U2F : Yubico on U2F and why it's important.