People are finding out about apps in all kinds of instances while using their smartphones—when they're engaged in an app, searching for another specific app, watching a YouTube video, or even surfing a mobile website. Search is a major source for app discovery, according to our research: One in four app users discovers an app through search. Say, for example, a business traveler has to fly to Miami on short notice and needs to find a place to stay. He heads to Google Search to look for "hotels in Miami" and finds an app that lists available local hotel rooms and short-term rentals. Because he's a frequent traveler, he decides to download the app to help him book his stay.*