Editing Processes: How Do We Improve?

Here's the latest from Jami Gold, Paranormal Author :

No matter our publishing path, our work always needs to go through an editing process. Our process could be any combination of the following options:

We might have an editor(s) at our publisher. We might pay for a freelance editor(s), usually before self-publishing. We might find friends or other writers to beta read. Or at the very least, we need to self-edit.

When are we ready for editing? How will we know? How are those processes abov...