MFA, or Multi-Factor Authentication, is a security mechanism that requires users to provide multiple forms of authentication or verification factors before gaining access to a system, application, or resource. Common examples of authentication factors include something the user knows (e.g., a password), something the user has (e.g., a security token or mobile device), and something the user is (e.g., biometric data like fingerprints or facial recognition). MFA provides an additional layer of security beyond traditional single-factor authentication methods, making it more difficult for unauthorized individuals to gain access.