Security is an important feature for reporting software. There are many conceivable cases where it would be necessary to restrict the rights on the reports. You may not want all users to be able to execute just any report and to thereby gain access to almost all data in your database. This can be configured using the report permissions in the report repository.
It might also be necessary to limit the locations from which it is possible to take reports and execute them. This will prevent someone from executing unknown reports on the report server. This can be configured using Report Locations.
With Permissions it is possible to control the access to the remote features and to allow access to all reports.