10 reasons why you should learn to use PowerShell. PowerShell combines command-line speed, the flexibility of scripting, and the power of a GUI-based admin tool. See why now might be the time to master it. PowerShell is a powerful scripting tool that can greatly expedite your admin tasks. If you haven't had a chance to learn how to use it, you might want to make time for it now. Here are some reasons why the effort will pay off. Note: This article is also available as a PDF download.