What is aka.ms/mfasetup and how does aka.ms/mfasetup work?

[victorialang1]

When logging into my Microsoft account I was redirected to aka.ms/mfasetup. I want to understand why aka.ms/mfasetup appears and how to complete aka.ms/mfasetup for account verification. Is aka.ms/mfasetup required for multi-factor authentication?