Answer Description
Windows 8 and later Windows 10 both come with multi-monitor task-bar support in the OS. The task bar in Windows is the GUI component typically at the bottom of the screen that shows the Windows start menu button, shortcuts, open programs & system tray.
Wikipedia
A taskbar is an element of a graphical user interface which has various purposes It typically shows which programs are currently running The specific design and layout of the taskbar varies between individual operating systems, but generally assumes the form of a strip located along one edge of the screen On this strip are various icons which correspond to the windows open within a program Clicking these icons allow the user to easily switch between programs or windows, with the currently active program or window usually appearing differently from the rest In more recent versions of operating systems, users can also "pin" programs or files so that they can be accessed quickly, often with a single click
Taskbar - Wikipedia, the free encyclopedia