The Quick Access Toolbar is a feature of File Explorer which exists in Windows 8 and Windows 8.1. It is part of the Ribbon UI in File Explorer and is located in the title bar. I consider this toolbar very useful because it allows you to have fast access to any ribbon command with one click.
Using keyboard shortcuts, you can execute any command from the Quick Access Toolbar. Sometimes keyboard shortcuts are faster than the mouse and can improve your productivity and save your time.