Google does not give you a detailed breakdown of where all the ad was shown within Google's services. They do give a breakdown of the 3rd party websites and apps where the ads ran and they are all terrible shorts drama and html5 games websites for me - some of them even had the same UI with different URLs! Shame.
Ideally I would like my app's ad to be placed in the Play Store only, but Google doesn't allow this control conviniently.
Next I am going to try using in-app actions for conversion instead of install, but I doubt it will be helpful at all.