One of the most useful features added in iOS 9 is a new back button.
Often, iPad users find themselves tapping a link that opens in a completely separate app – say, a link in Messages to a webpage in Safari or from Facebook to a video in YouTube. In the past it’s been a little cumbersome to get back to what you were doing quickly.
Not anymore! Whenever a new app is launched from a link – even something you’ve searched for from Spotlight – there will be a small Back to… button in the top left of the screen. Simply tap it to return to the previous app.