if you intend to cache html or other file formats not cached by default, you need to make a Cache Ru
if you intend to cache html or other file formats not cached by default, you need to make a Cache Rule

example.com then the cache rule will be applied.www.example.com then you will be redirected to example.com, after which all the rules will run again and so the cache rule will be applied also.example.com (it's correct right now), not www.example.com, because having it on www.example.com will simply cache the redirect and not the page.