What is 2FA/MFA?

2FA (Two-Factor Authentication) and MFA (Multi-Factor Authentication) are security systems that require multiple methods of authentication to verify a user's identity. Instead of just a password, they typically involve something the user knows (password), something the user has (phone, security key), or something the user is (biometrics). They are commonly used to protect online accounts and sensitive data by adding extra layers of security to prevent unauthorized access even if a password is compromised.