Security in IT is the protection of computer systems from the theft and damage to their hardware, software or information, as well as from disruption or misdirection of the services they provide.
To give you some context: I have a user who has been assigned only the role %HS_UsageDashboard_Access.This allows them to access the dashboards correctly (by giving the direct URL). Then, if I try to access the Management Portal with this same user, I can log in with no access to any resources within it (as expected).