To get access to ZR reports you need to log in to the reporting server. Customers however like to have dashboard available that people can look at without logging in. As example, when doing a migration project from Win 7 to Win 10 I would like to be able to build a dashboard that shows per location how many Win 7 and how many Win 10 we have.
There should be a Public option in the rights groups that would allow access without logging in.