failed to load ad : 3

Question

I\'m setting an ad to my Android application using DoubleClick and can\'t manage to show the final ad, can someone help me?

When I test an ad by adding ".addTest

Answer 1

This error can be because of too much reasons. Try first with testAds ca-app-pub id to avoid admob account issues.

Check that you extends AppCompatActivity in your mainActivity, in my case that was the issue

Also check all this steps again https://developers.google.com/admob/android/quick-start?hl=en-419#import_the_mobile_ads_sdk