Two-factor authentication (2FA) is an extra layer of security that requires you to provide an additional piece of information in addition to your password when you log in to your account. There are several types of 2FA, including:
SMS-based 2FA: This type of 2FA sends a code to your phone via text message (SMS) when you try to log in.
Email-based 2FA: This type of 2FA sends a code to your email address when you try to log in.
Authentication apps: There are several apps that you can use to generate 2FA codes, such as Google Authenticator and Duo Mobile. These apps work by generating a new code every few seconds, which you can then use to log in to your account.
Security keys: Security keys are physical devices that you can use to log in to your account. They work by verifying your identity when you insert the key into your computer or tap it against your phone.
In general, security keys and authentication apps are considered the most secure forms of 2FA, as they are less susceptible to attacks such as SIM swapping. However, SMS-based and email-based 2FA can still provide an additional layer of security and are better than not using 2FA at all.