What's the normal setup for one supporter and multiple supported computers?

Corinos

When I was supporting my family with a free plan, I just installed the full version on all machines, logged in on all and everything worked.  I've since moved into a Business license, and I'm not super clear on how I'm supposed to use the various products.  I don't understand how Trusted Devices, Active Logins and Detected Installations all work together.

Am I meant to only install the full version on my Supporting computer/phone and use the Host on all the others? Whats the difference between the Host and TeamviewerQS?

Thanks!