App Indexing helps you get your app found in Google Search. Once your app is indexed, mobile users who search for content related to your app can see an install button to your Android app in Search results. This helps you increase your install base.
Keep your users coming back -
App Indexing also helps you keep your users coming back. When mobile users with your app installed search for something relevant to your app content, Search results can link directly to the relevant content in your app. This keeps your customer base engaged.