Multi-Factor Authentication (MFA) is a crucial defense mechanism against cyber threats, adding an extra layer of security beyond passwords. By requiring users to verify their identity through multiple factors such as passwords, biometrics, and security tokens, MFA significantly reduces the risk of unauthorized access. It mitigates common security vulnerabilities like phishing attacks and credential theft. Implementing MFA across systems and applications is essential for safeguarding sensitive data and maintaining a robust cybersecurity posture.