Flutter web

1. First, ensure you've added the Google Mobile Ads SDK dependencies in your pubspec.yaml:

yaml

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dependencies: google_mobile_ads: ^[latest_version]

2. For Android, check your android/app/build.gradle:

gradle

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dependencies { implementation 'com.google.android.gms:play-services-ads:[latest_version]' }

3. In your main.dart, make sure you're initializing the Mobile Ads SDK before using any ad widgets:

dart

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import 'package:google_mobile_ads/google_mobile_ads.dart'; void main() async { WidgetsFlutterBinding.ensureInitialized(); await MobileAds.instance.initialize(); runApp(MyApp()); }

4. For iOS, verify your ios/Podfile:

ruby

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platform :ios, '10.0' # or higher

And in Info.plist, add:

xml

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<key>GADApplicationIdentifier</key> <string>ca-app-pub-################</string> <key>SKAdNetworkItems</key> <array> <dict> <key>SKAdNetworkIdentifier</key> <string>cstr6suwn9.skadnetwork</string> </dict> </array>

Common troubleshooting steps:

1. Run flutter clean

2. Delete the build folder

3. Run flutter pub get

4. Rebuild your project