Purpose of dbo.Policies table in SSRS

What is the purpose of the [dbo].][Policies] table in SSRS ReportServerDB database?

I see two columns, PolicyID and PolicyFlag and I don't get any clue about purpose of this table. Is it possible to add anew row into that table and what represents those data, i.e. rows?

Each row of Policies table declares via PolicyFlag column if that policy is defined for system roles.

A policy can be related only with created user defined objects, UserType = 1 in User table. System defined objects like NT AUTHORITY\SYSTEM and Local Server Administrator aren't mapped with policies.

If you run this query:

SELECT b.username, 
       c.policyflag, 
       d.rolename, 
       b.usertype, 
       c.policyid 
FROM   policyuserrole a 
       INNER JOIN users b 
               ON a.userid = b.userid 
       INNER JOIN policies c 
               ON a.policyid = c.policyid 
       INNER JOIN roles d 
               ON a.roleid = d.roleid 

By default you will have two rows in Policies table.

REFERENCE

Let me know if this helps.