While the taskbar is at the bottom of your desktop by default, Windows 8.1 Update
has added to also see the taskbar on any screen, including Start or a Windows Store app.
The taskbar is where you can switch between apps you have open, go to Start or Desktop, check the notification area, and can pin apps you use often so you can open them right from any screen. You can customize the taskbar, including the way taskbar buttons look, how they group together when you have more than one window open, where the taskbar is on your desktop, and what icons and apps are on it.
This tutorial will show you different ways to open the taskbar in Windows 8.1 Update
and Windows RT 8.1 Update