For those who have released a game into Production on Google Play. Did it take some time for admob ads to work? I just promoted my Alpha release to official Production release and everything is good except the ads are not showing up.
I made damn sure everything was working in Alpha before promoting it to Production. The alpha release was receiving live ads.
I have googled this and the little I found was that I might need to wait a few days for the ads to show up but find that weird because as said before, they were good in Alpha.