Softaculous makes it possible for users to rate Software/an Application. So the ratings of an application you see are the votes given by individual users like you. It enables a new user to select the best software in a particular category.
Rating an application is pretty simple. Just click on the Ratings Tab in Softaculous for the application you want to rate. It will open a new page showing the ratings of that application. Select the rating you wish to give to that software and click Submit Ratings.