App Transport Security Settings
Info.plist Configuration (Optional)
If you add AdMob SDK to your project, a GADApplicationIdentifier key value whose string value is your AdMob app ID is added in the Info.plist file of your app.You can find your App ID in the AdMob interface.
WARNING
Note: Make sure that you use your actual AdMob App ID instead of the ID listed above.
Tips: This step must be performed since Google Mobile Ad SDK 7.42.0.If you fail to add this Info.plist entry, it will cause the system crash, and display the following message "The Google Mobile Ads SDK was initialized incorrectly".