I have developed native adMob in my application by coping code from Sample Application given by google from below URL https://github.com/googleads/googleads-mobile-ios-examples/tree/master/Objective-C/admob/NativeExample
I am getting: Error by using my AdUnitID: failed with error: Request Error: No ad to show.
But when i use test key given in Google sample app than my application native ads are working fine.
So What is the problem with my native Ad unitId ?
Google Native AdUnitID : ca-app-pub-3940256099942544/3986624511 My App Native AdUnitID : ca-app-pub-3415315092173981/2210049154
Update: When i put "testDevices" with my application UnitID than my application native ads are working fine. but when i remove "testDevices" than getting same error.