What are the available predefined roles in SSRS Report Server.?

Problem: What are the available predefined roles in SSRS Report Server.?

Solution:  Role Definitions - Predefined Roles

After reports are deployed on to report server, reports are given specific role permissions that are available predefined. These options are shown inside report server database to list available report permission roles.

SELECT [RoleName]

               ,[Description]

  FROM [dbo].[Roles]

RoleName	Description
Browser	May view folders, reports and subscribe to reports.
Content Manager	May manage content in the Report Server.  This includes folders, reports and resources.
Model Item Browser	Allows users to view model items in a particular model.
My Reports	May publish reports and linked reports; manage folders, reports and resources in a users My Reports folder.
Publisher	May publish reports and linked reports to the Report Server.
Report Builder	May view report definitions.
System Administrator	View and modify system role assignments, system role definitions, system properties, and shared schedules.
System User	View system properties, shared schedules, and allow use of Report Builder or other clients that execute report definitions.

Example:

In a report server to change the report security, from one role to another role.

Step 1: go to the report server.

Step 2: select a report and click on the security, and then select the role and edit the permissions.

Step 3: Select the role you want assign from the list of options.