The important things if you want to reach as much people as you can are consistency, activity, and some sort of promotion such as ads or posting on social media, plus finding the right audience for your story, but there's a ton of various factors and tiny things that may affect that. Title, cover, synopsis, opening, genre, tags, type of prose, interaction with readers.
I was a little bit late, Jaymi above said most of what I said in more detail. Still, yeah, those are the main things you can do or improve, though there's probably something else I forgot. A lot of it has little to do with actual writing.