Now that I have downloaded the help file what do I do?

Copy it Into the installED foder?

EDIT:

Win 10, Pro & Libre Office 7.0.2.2 to answer the opther guy.

I can copy the folder libreoffice-help-7.0.2.2 into C:\Program Files\LibreOffice\help would that do it ?

Depends on your OS which you haven’t mentioned. Please edit your question to tell which OS and LibreOffice versions you are using.

On Windows: you must install the downloaded Help installer(s). (You can install more than one localized Help)