Windows PowerShell has a high level of discoverability; that is, to learn how to use PowerShell, you can simply use PowerShell. Online help serves an important role in assisting in this discoverability. The help system in Windows PowerShell can be entered by several methods. To learn about using Windows PowerShell, use the Get-Help cmdlet as follows:
This command prints out help about the Get-Help cmdlet. The output from this cmdlet is illustrated here:
NAME Get-Help SYNOPSIS Displays information about Windows PowerShell cmdlets and concepts SYNTAX Get-Help [[-name] <string>] [-component <string>] [-functionality <string >] [-role <string>] [-category <string>] [-full] [<CommonParameters>] Get-Help ...