Role assignments in SSRS

Question

I have created a SSRS report. In the report viewer I saw 2 security sections

1. site settings
2. folder settings.

What is the difference between

Answer 1

First add the user :

Goto :
1) Sitesettings-->Security and click newrole assignment

2)Enter the Group or User Name and select role based on your requirement. Please see below screenshot.

Then click on OK button. Here you can see the list of Roles which are assigned to group or users.

3) Now click on the link of Home and then click on the link of Folder Settings.

4) You will see results like following.

5)Then click on New Role Assignment and you will see like below screenshot.

6) In that screen Enter group or user name and select roles and click ok for that users

NOTE:
1)Somebody having permission just only for viewing report.
To see only Reprot==>Select Browser role only
2)Somebody having permissions to view reports, upload report and also modify the datasource and parameter properties in the report.
Select "The Publisher Role" and The "My Reports Role" for them