Two-factor authentication (2FA), also known as two-step verification or multi-factor authentication (MFA), is a security process that adds an extra layer of protection to online accounts beyond just a username and password. It requires users to provide two different forms of identification to verify their identity when logging in, making it much harder for unauthorised users to access accounts, even if they have the password.
By requiring two different forms of identification, 2FA significantly reduces the risk of unauthorised access, even if a password is stolen or compromised. It's a highly recommended security practice for all online accounts, especially those containing sensitive information.