User accounts and HomeUsers group

[balubeto]

Hi

I use Windows 8.1 Update 1 Enterprise 64-bit.

Opening the "User Accounts" window via the netplwiz command, I know that, for each account created, there are two accounts belonging to different groups. How come?

In addition, in this window, the HomeGroupUser$ account is displayed. What is this hidden account?

When is used the HomeUsers group?

Thanks

Bye