Please explain some setting options

First of all, thank you, this one works fine! Second, I really need some explanation to the options that can be switched on and off.

I don’t want my users to be able to switch to other sites under “my sites”, so I left out “Dashboard my Sites” and turned on “Control Panel” and “Dashboard Dashboard”. What is Dashboard Dashboard? Further, with “my sites” turned off, they are still able to get the dropdown with the other sites”.

And what does the following settings means – what are the options these control?
“Users” and “Users Authors and Users”

https://www.ads-software.com/extend/plugins/menus/