From the Users Reputation (Admin Control Panel -> Settings -> User Settings -> Users Reputation) menu:
If checked, enables the reputation module.
If enabled will set reputation comments to private/unavailable. Users won't be able to see and read them.
Note: Only the reputation score will be viewable.
Check the above to enable the auto feedback function.
Enter the number of days after which the auto feedback is posted.
Enter the score that is posted by the auto-feedback plugin.
Enter the auto-feedback comment to be added.