Ipad

 Sidecar is a fantastic feature introduced in macOS Catalina that allows you to use your iPad as a secondary display and extends the functionality of your Mac. With Sidecar, you can have the convenience of a dual monitor setup

Handoff is a feature available on iPhones and iPads that allows you to start a task on one device and seamlessly continue it on another. This is especially useful when you are working on a document, browsing the web, or composing