Hi Jonathan,
Also what does the option for back culling do?
It hides the back side of faces, turns them invisible. It's useful for particular cases such as if you want to work on an interior and the walls are getting in your way. Also I think games uses it a lot to save on resources.
Link to the manual:
https://docs.blender.org/manual/en/latest/render/workbench/options.html
