Report Permissions allow you to manage which roles can create Personal Dashboards and also to enable user roles to create their own reports.
For more information about Personal Dashboards, access this article.
How to access?
You can manage this in the System Administration → System Settings.
This feature is restricted to Global Admins only. If you are a Global Admin but don't know how to access this page, please contact your CSM and they can show you.
The How to Guide:
1. Go to the System Settings → Report Permissions
2. To manage permissions simply select or unselect the checkboxes to enable or disable the feature for your users
3. All your changes are automatically applied!!