"2FA" stands for Two-Factor Authentication, a security measure that requires two different forms of identification to verify a user's identity. This approach enhances account security by combining something the user knows (like a password) with something they possess (like a mobile device or a security token). In practice, after entering a password, users typically receive a verification code via SMS or email, which they must enter to gain access. By requiring two separate forms of verification, 2FA significantly reduces the risk of unauthorized access even if a password is compromised.