Sometimes, you are running a cmdlet for a first time, and want to check its help file but unfortunately it displays very basic information or no info at all, other than the syntax.

In such cases, if your machine is connected to internet, you can use below command to update help files (do this from a powershell prompt running as administrator):

Update-Help -Force

If your machine is offline, you can use Save-Help cmdlet to save help files to a local/network drive. After this, you use the saved files to update help content on offline machine.