What is Windows PowerShell?This article will answer the question.
It also will show some Windows PowerShell commands and the comparison between Windows PowerShell and Windows Command Prompt.
What Is Windows PowerShell?

Windows PowerShell is a Windows command-line shell and scripting language tailored for system administrators.
Like many shells, Windows PowerShell allows you access to thefile systemon the computer.
Functions of Windows PowerShell Commands
Windows PowerShell commands can help you do more.

Lets see what they can do for you.
In other words, the Get-Item cmdlet gets the item at the specified location.
The syntax for this cmdlet isCopy-ItemE:\TWCTest.txt-DestinationD:.
6: Delete a file or directory
TheRemove-Itemcmdlet is used to remove files from one locatio to another.
The syntax for this cmdlet isRemove-ItemE:\TWCTest.txt.
Windows PowerShell VS. CMD
You may find there are some similarities between Windows PowerShell and CMD.
The following content will show you their differences.
PowerShell and CMD are completely different, although thedir commandworks the same way in both interfaces.
Firstly, PowerShell uses cmdlets which are self-contained programming objects that expose the underlying administration options inside of Windows.
However, CMD is just a legacy environment in Windows system.
In one word, PowerShell is not just a shell.