I hear this question a lot from newcomers.
This is a really important question, and this post is meant to be a thorough answer. (I’ll assume that you know how to discover your Enneagram type, and that question is basically: “What do you do with the Enneagram after that?”)
But first, a point of clarification.
There is a field called ontology that studies how things exist. It sounds abstract, but it’s simple.