Sidecar in macOS Catalina and iPadOS lets you extend your workspace by using your iPad as an additional Mac display.
To learn more about this topic, visit the following articles:
Use your iPad as a second display for your Mac with Sidecar: https://apple.co/2pbGKpG
How to update your Mac to the latest version of macOS: http://apple.co/1jMEmNp
How to update your iPad to the latest version of iPadOS: http://apple.co/1ZEauE2
Additional Resources:
Contact Apple Support for Mac: http://apple.co/Mac
To subscribe to this channel: https://www.youtube.com/c/AppleSupport
To download the Apple Support app: http://apple.co/2hFtzIv
Apple Support on Twitter: https://twitter.com/AppleSupport
For more videos, go to Youtube Apple Channel