"2FA" stands for two-factor authentication, a crucial security mechanism used in the context of digital security. It enhances the login process by requiring users to present two different forms of verification before gaining access to accounts or sensitive information. The first factor is typically a password, while the second could be a one-time code sent to a mobile device or an authentication app. This additional layer significantly reduces the risk of unauthorized access, making it a vital practice for protecting sensitive data and ensuring user identity verification.