By default, the taskbar is available in the bottom
center
of the screen as seen below.

If you enabled automatically hide the taskbar, then the
screen would look like below

To automatically hide the taskbar, follow the below
steps:
-
Open Settings (Win+I).
-
Click on
Personalization on the left side, and click
on Taskbar on the right side

-
Click on Taskbar
behaviors on the right side to
expand it

-
Check (enable)
Automatically hide the taskbar

You
can show the taskbar on demand by:
-
Hover pointer on
border of taskbar location.
-
Press the Win + T
keys.
-
On a touch screen,
swipe inwards from the border (ex:
bottom) of taskbar location.
To unhide the taskbar, repeat the above
steps, and uncheck the option Automatically hide
the taskbar