"2FA" stands for Two-Factor Authentication. This is a security measure that requires two distinct forms of identification before granting access to an online account or system. Typically, it combines something the user knows (like a password) with something the user possesses (such as a mobile device or hardware token). The implementation of 2FA significantly enhances security by adding an extra layer of protection against unauthorized access, ensuring that even if the password is compromised, the account remains secure without access to the second factor.