Some important things to keep in mind while installing new apps in your mobile from Google play store. First of all look at the ratings of the application, if it has good rating only then install the application else do not install the app as it might be a spam application.
Secondly, look at the review of the application, if there are positive reviews then the application is genuine else the app is just a waste.
Next, do not install unnecessary antivirus and ram cleaning application as they have negative effects on your mobile and make it more slow.
Next, do not install apps that have ads displayed on it because those apps make your mobile more slow and lagging.
Plzz keep these few points in your mind before installing application in your mobile.