Hi,
To transfer the file from a recent version of macOS to an iPad, you can open the iPad in Finder and navigate to the Kiosc app. Then you can simply drag and drop the showfile.
From Windows it can be done using iTunes I believe, it is a bit less convenient but it should also work.
There is no real straight answer, because it depends on the model of iPad and version of operating system...
Greetings,
Bootsy