Hi, I put my game on the Play Store but does not appear advertising.
I put in the properties the IDS as in the images.
post a link to your apk to check
Seems that there no ads available
AdMob Error Codes & Logs - Google AdMob Community
This error means
"Error Code 3 : ERROR_CODE_NO_FILL Description : The ad request was successful, but no ad was returned due to lack of ad inventory. Why is it Happening : Advertisers can target specific regions, platforms and user profiles based on business relevance, which can sometimes result in lower availability of Ads for a particular region or user profile."