You may be thinking about the way of working of app rating. Well, app rating helps you to build an authority to your application. You can not only increase the number of viewers but also enhance the number installations. Good app rating works by enhancing the probability for your app to be found by users on play-store. You can buy app ratings from reliable service providers on internet. This will increase the ranking of your app on the search engine too. Similarly, you can use app reviews for spreading awareness about your app.