from the link in my post, click the Download Tool Now button.
the will download the Media Creation Tool, run that and select the Create installation media option when prompted.
select your Language, Edition and Architecture then either create an ISO file onto your PC or create a bootable USB flash drive with the image on it.
either method allows you to then use that ISO image (when burnt to a DVD) or that USB stick to install Windows 1803 onto other devices.