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