What is the Catalina update for Mac OS all about? What are the features of this update?

• There are a few new apps, as well as a few others with significant new functionality and UI changes. The performance and usability have both been improved.
• Project Catalyst: iPad apps that have been ported to the Mac Music, Podcasts, and Apple TV apps, which have taken the role of the iTunes app.
• The Photos app has been improved.
• The Notes app has been improved.
• Apple Mail now has three new features: unsubscribe, silence a thread, and block a sender
• Safari has been updated.
• Reminders has been redesigned.
• Find My iPhone and Find My Friends have been combined into a new Find My app.
• For Mac, there's a programme called Screen Time.
• Sidecar is a device that allows you to use an iPad as an external display.
• Voice Commands
• Improved features for maintaining your Apple ID
• QuickTime Player has been enhanced. Picture-in-Picture, Movie Inspector, and more features are available.
• Sharing folders in iCloud Drive
• The ability to revert to a previous version of macOS from a snapshot
• Support for international languages has been improved.

Read More: How do I block updates to Mac OS X Catalina?