Google claims only 0.05 percent of Android devices that download apps solely from its Play Store have a potentially harmful app.
Protects device by vetting apps: Google uses in-store and on-device monitoring to guard against harmful apps. The Play Store also serves as an entertainment hub, letting you buy or rent movies, TV shows, books, and music, which you can watch or listen to on your Android device, Chromecast-connected TV, and through the Chrome browser on your Mac or Windows PC. With the Google Play Store app, download apps and games for your Android phone or tablet.