The apps in question are CM File Manager and Kika Keyboard.
The tech giant told BuzzFeed News that these two apps contain code used that can execute ad fraud techniques like click injection and click flooding.
Cheetah Mobile also voluntarily removed its Battery Doctor and CM Locker apps from the Play Store following the initial report.
Google is still continuing to investigate the two apps and will take additional action.
Ever since Android 6.0 Marshmallow launched, Android has granted users control over app permissions, dictating what our apps can and cannot do. The Chinese developer suggested that third party SDKs were to blame for any ad fraud, while also saying it would take legal action against Kochava. The Kika Keyboard app was on the top spot on the Play Store in the top keyboard app list, and Cheetah Mobile is said to be the largest developers in the Android ecosystem.
CM File Manager and Kika Keyboard together have over 250 million downloads on the Play Store, which indicates that the revenue pocketed illegally by the two apps must be huge. Now, as far as Google's very own awards are concerned, Drops: Learn 31 new languages won the "Best App of 2018" award, while PUBG Mobile actually won the "Best Game of 2018" award by Google as well.
This was the first year Google gave users the chance to vote for their favorite game, app, and movie of the year.