Two-Factor Authentication, or 2FA, is a security process that requires two different forms of identification before granting access to an account. This typically involves something you know, like a password, and something you have, such as a smartphone or a security token. By using 2FA, even if someone steals your password, they cannot access your account without the second factor. 2FA enhances security for various online services, including email, banking, and social media. Common methods for the second factor include receiving a text message with a code or using an authentication app. Implementing 2FA significantly reduces the risk of unauthorized access.