"2FA" stands for Two-Factor Authentication, a security process that requires two separate forms of identification before granting access to an account or system. This typically involves something the user knows (like a password) and something the user has (such as a smartphone app generating a code or a physical token). 2FA significantly enhances account security by adding an extra layer of protection against unauthorized access, making it more difficult for attackers to compromise accounts even if they have the password. It is widely recommended for securing sensitive information.