it goes hand in hand with macOS
The Multi-Touch gestures in macOS make everything you do on MacBook Air more intuitive, direct, and fun. And the spacious Multi-Touch trackpad is perfectly designed for them, whether it’s a three-finger swipe to activate Mission Control or a four-finger pinch to see all your apps in Launchpad. Gesture responses are smooth and realistic. So when you’re scrolling up and down a web page or swiping from one full-screen app to another, it’s almost like you’re touching what you’re seeing.