Google set out to index to mobile apps, to bringing accessibility and discoverability to them. App Indexing is the ability for Google to index apps just like websites. Deep links to your Android app appear in Google Search results so users can get to your native mobile experience quickly, landing exactly on the right content within the app.
- Drive return visits to your app
For users who have your app installed, having deep links appear in search results will help drive organic traffic back to your app.
- Re-engage your users
For users who have viewed pages in your app, and later searches for similar content, you can use the App Indexing API to have deep links appear in search suggestions. For example, a user visits a pizza restaurant page in an app. The next time the user searches for pizza, a deep link will appear in search suggestions before seeing search results.
To learn more, check out: https://developers.google.com/app-indexing