Writers often conflate editing with proofreading. In practice, editing happens at several distinct levels — and knowing the difference helps you hire the right person at the right stage. Developmental editing This is the big-picture pass. A developmental editor looks at structure, pacing, character arc, theme, and whether the book works as a whole. They might tell you your protagonist is passive for the first hundred pages, or that your third act collapses because the stakes were never properly established.