From the liteblue website:
To better secure your personal information, multifactor authentication (MFA) will soon be deployed on LiteBlue. MFA is a verification method that will require you to provide two or more confirmation factors to access this website. After January 15, 2023, you will be required to set up your MFA preferences when logging into LiteBlue. Additional details and instructions coming soon.
What is MFA?
Multi-factor authentication is a layered approach to securing data and applications where a system requires a user to present a combination of two or more credentials to verify a user’s identity for login.MFA-Fact-Sheet-Jan22-508