Admob No fill from ad server - failed to load ad: 3

Question

My issue is that ads are not being displayed at all in my app, test mode or not. I am going to keep this question specific to test mode, and once I get that working I will w

Answer 1

If you app support Designed for Families.

Bundle extras = new Bundle();
extras.putBoolean("is_designed_for_families", true);

AdRequest request = new AdRequest.Builder()
        .addNetworkExtrasBundle(AdMobAdapter.class, extras)
        .build();