California, Feb 21: Google on Thursday removed over 600 mobile application from its play store for violating its ads policy.

The search giant had removed the apps for violating two of its app policies.

“Nearly 600 apps have been removed from the Google Play Store and banned from ad monetisation platforms, Google AdMob and Google Ad Manager, over mobile ad fraud,” said Google in an official blog notes.

“We define disruptive ads as ads that are displayed to users in unexpected ways, including impairing or interfering with the usability of device functions. While they can occur in-app, one form of disruptive ads we’ve seen on the rise is something we call out-of-context ads, which is when malicious developers serve ads on a mobile device when the user is not actually active in their app,” the post further read.

Google has developed a machine-learning based approach to detect when apps show out-of-context ads.