Apple Search and iOS 9
Search Improvements iOS 9 now makes it easy for users to discover information in apps by surfacing the content of the apps and websites in Search on iOS 9. (with seamless universal linking, this takes users to the best place to view the results.) App history Deep links make it easy for users to get back to where they were in your app—just indicate that your app is eligible for Search and iOS 9 will create them for you. Content...
How To Get App Content Into Google Search Results
What is App Indexing for Google Search? App Indexing lets Google read apps just like websites. Deep links in your Android app can now appear in Google Search Results allowing users to navigate directly to the native mobile experience landing on the correct content within your app. What you need: The user needs to have your app installed. You need to establish the relationship between your web pages and app deep links. Use the App...