Introduction

What is PowerShell (aka PoSH)

Check out this introduction from Microsoft

There are/were two versions of PowerShell: Windows PowerShell which was included with Windows that was built on full .NET Framework. Then a few years ago, MSFT created .NET core to support cross platform (Windows, Linux, MacOS). Which lead to PowerShell Core. They just updated to PowerShell 7 (dropped Core from name) which is based on 3.1 .Net Core and really makes the Windows PowerShell obsolete.

Point being always download and use PowerShell 7 or later as of today going forward!