Additional Google AdMob steps - cleveradssolutions/CAS-Android GitHub Wiki

CAS assigns a new AdMob App ID for your application to the correct operation of all features.

You can find your Admob App ID in the CAS UI:

1. Click the Show AdMob App ID button.
2. Copy the id from the form.
3. Add a <meta-data> tag with android:name="com.google.android.gms.ads.APPLICATION_ID" in your app's AndroidManifest.xml file.
4. Insert AdMob app ID to android:value, surrounded by quotation marks, as shown below.

<manifest>
  <application>
    ...
    <!-- Sample AdMob App ID: ca-app-pub-3940256099942544~3347511713 -->
    <meta-data
        android:name="com.google.android.gms.ads.APPLICATION_ID"
        android:value="ca-app-pub-xxxxxxxxxxxxxxxx~yyyyyyyyyy"/>
  </application>
</manifest>

Note that failure to add the <meta-data> tag as shown above results in a crash with the message:

The Google Mobile Ads SDK was initialized incorrectly.

If your app has special requirements, you can set the optional SharedPreferences gad_has_consent_for_cookies.
The Google Mobile Ads SDK will enable limited ads (LTD) when the gad_has_consent_for_cookies preference is set to zero.

SharedPreferences sharedPreferences =
  PreferenceManager.getDefaultSharedPreferences(context);
sharedPreferences.edit().putInt("gad_has_consent_for_cookies", 0).apply();