I have been getting some amounts between $0.2 to $0.7 debited from my final payment from AdMob ads under the title "invalid activity" in my payment details.
Yes the amounts are small but i am still worried as i have been extra careful while testing i used the test keys and i have not told any of my friends to click on my ads or have clicked on them myself.
I did have the same issue for my web-site but that was due to some bots which i black-listed in the server access files so i am no longer getting such "invalid activity" on my blog earnings
I have built my apps in Ionic Framework.
So my question is how can i detect where the invalid activity is coming from in my app and how can i prevent it.