Authentication: Using user credentials like Id & password to authenticate the user.
Multifactor Authentication (MFA): combines two or more independent credentials.
The goal of MFA is to create a layered defense and make it more difficult for an unauthorized person to access a target such as a physical location, computing device, network or database. If one factor is compromised or broken, the attacker still has at least one more barrier to breach before successfully breaking into the target.
Examples of MFA: OTP, Biometrics, Swiping card, PIN,etc