I don't understand anything. I read a bunch of articles and not one of them is not my case. In all articles we are talking about functions: GoogleMobileAds_Init and the like. I have them not at all. I that only did not do, however functions did not appear. Here's what I was able to pull from the extension page "If you're using the Extension in GMS2, you'll need to inject the following into the Extension's 'Inject to AndroidManifest.xml Application' section (enclosed in < and / >): meta-data android:value="true" android:name="YYGoogleCloudSavingEnabled"" What does it mean? What file?