Get-Help can be used to view help in PowerShell. You can search for cmdlets, functions, providers or other topics.

In order to view the help documentation about jobs, use:

Get-Help about_Jobs

You can search for topics using wildcards. If you want to list available help topics with a title starting with about_, try:

Get-Help about_*

If you wanted help on Select-Object, you would use:

Get-Help Select-Object

You can also use the aliases help or man.