Question

what makes a monomyth a useful way to think about a novel or why is a monomyth important

Answer 1

The general pattern of adventures that mythological heroes encounter during their quests. It's a cyclical pattern inspired in part by the ancient ouroborus symbol representing the cyclical pattern of nature, as well as the necessity of life living off other life.
Monomyth is divided in:
Birth/home of heroes, call to adventure, helpers, crossing the limit, tests, climax, return, elixir

Answer 2

i understand that but why would it help the reader when reading?