Making your app more discoverable leads to more downloads and generates revenue. iOS 9 adds a variety of ways to surface the rich content in your app making search results more relevant. Understand how you can enhance search results with App History and CoreSpotlight. See how small changes on your website can produce better Safari suggestions. Gain insights into how deep app links can bring people directly where they want to go in your app, making your app’s content even more discoverable and searchable than content on the traditional web.
WWDC 2015 > System Frameworks > Introducing Search APIs