The purpose of Quick Access itself is nothing but to help you improve productivity. Previously, Quick Access was known as Favorites. This feature has been around before Windows Explorer was renamed to File Explorer.
Quick Access itself is basically not a new feature. All recently-used files will be added to Quick Access.
Just like the name suggests, this feature allows you to quickly access the frequently-used files or folders. You can find this feature on File Explorer. There are lots of built-in features offered by Windows 10 to make your workflow faster.
