Proofreading identifies and fixes all errors in spelling, punctuation and grammar. It also revises inconsistencies in formatting, citation, and references. Proofreading usually focuses on making minor adjustments to the text rather than altering the content or style.
Editing involves improving the overall writing quality to make a written work as strong, clear, and professional as possible. Editors use more creativity and consider the intentions of the author and the needs of the reader when revising the work. Editing can result in more extensive changes to the text, including rephrasing and changes in key vocabulary terms.