If you are new to PowerShell, then you will definitely find the Get-Help cmdlet to be a quite useful tool for learning about Windows PowerShell. Here’s some “help” on using Get-Help:
get-help
Displays information about the help system in Windows PowerShell.
get-help get-command
Displays simple help for a cmdlet, such as Get-Process or Get-Eventlog.
get-help get-command -detailed
Displays detailed help for a cmdlet, including parameter descriptions and examples.
get-help get-command -full
Displays all of the available help for a cmdlet.
get-help get-command -examples
Displays only the examples of a help file.