Microsoft is trying to create a password-free world.Screenshots.
Basically, with this feature when creating a Microsoft account, users only need to provide their phone number, without entering a password. When using that phone number to log in to Windows 10, Microsoft will text the user a code to enter on the login screen. After that, users can set up PIN, fingerprints, or method of face login via Windows Hello. Users will only need to receive the code on the phone when logging in on a new PC only.
To use this feature on the latest Windows Insider builds, users need to create a passwordless phone number account through a mobile application like Word on iOS or Android devices.
See more: