Tip: You can open the help in a graphical window by using the parameter –ShowWindow (since PowerShell v3).
You can search some keywords (results are highlighted), customize the help sections, etc.
help Get-Content -ShowWindow
It is useful when you don’t want to go online using your browser to read some help using: help Get-Content -Online
You could read the about topics:
Note: Be sure to update the help on regular basis to have the latest help files.