Multi-factor authentication (MFA) is a security process that requires users to provide two or more verification factors to gain access to an account or system. This method enhances security by combining something the user knows (like a password), something the user has (like a smartphone), and something the user is (like a fingerprint). By using MFA, organizations can significantly reduce the risk of unauthorized access, even if a password is compromised. Many online services, including email providers and banking apps, now offer MFA as a standard feature to protect user accounts from potential threats.