Introduction: Copyediting: Spelling, grammar, punctuation, and syntax, as well as clarity, logic, and consistency, while retaining your unique voice.
Substantive Editing: All the mechanics of a copyedit, with a heavy dose of developmental and structural suggestion.
Developmental Editing: A developmental edit goes beyond words and sentences and looks at the entire manuscript and its organization.
Proofreading: Checking the final digital files or physical book for last-minute errors and quirks introduced in formatting.