Say you want to write about how awesome your pet toaster is and publish it for everyone to see. Say you want to make an app where users can interact with their own virtual pet toasters. Say you want to start selling pet toasters online once you’ve convinced everyone how awesome they are.
In this case, I’d probably be a bit concerned about your sanity. But, more importantly, you’d want to learn some web development – that is, the art of creating web pages like the one you’re viewing right now.