I am not sure if I fully understand your questions specifically. But let me try to explain CVs.
Imagine you are a manager at an “Enterprise” Linux Customer. You may have some requirement that everything MUST go to Dev/QA before it can go to Prod. But packages are coming out all the time. Content View Versions are snapshots of a set of repositories (Content View) at a point in time. You can then confidently “promote the ‘Web Server’ repositories (Content View) to Dev on Monday, then from Dev to QA on Wednesday and promote from QA to Prod on Friday” for example. You will also know that EXACTLY what was in Dev on Monday will make it to Prod on Friday.
It’s also about access control. You may mirror PostgreSQL right from “postgresql.org” and you want your “DB Servers” to have access to those mirrors but your “Web Servers” should not. Or keeping in mind Katello is the Upstream of Red Hat Satellite and that Red Hat sells licenses for JBoss EAP. You may want your “App Servers” to have access to “JBoss EAP” and “RHEL 7 x86_64 Server” but “Web Servers” may only need access to “RHEL 7 Server x86_64”. Or maybe your devs use laptops w/ licenses for “RHEL 7 Workstation”.