The Windows interface includes a special application desktop toolbar called the taskbar. The taskbar will show on the bottom of a display screen by default.
If you have more than one extended display connected to your PC, then the taskbar will show on all displays by default. The main taskbar will include the notification area on it, and is on your main display by default. The other taskbars show without the notification area on any other connected display that is not set as your main display.
You can change the taskbar location to be at the left, top, right, or bottom edge on a screen.
You can also move the main taskbar to be on any connected display screen other than on the default main display.
This tutorial will show you how to change the taskbar location on screen for your account in Windows 10.