Proofreading focuses on surface-level corrections including spelling, grammar, punctuation, and formatting errors it's the final polish before submission. Editing goes deeper: copy editing improves sentence structure, clarity, and academic tone, while developmental editing addresses organization, argument strength, evidence quality, and overall structure. For a 5,000-word essay, proofreading takes 2-3 hours, copy editing 4-6 hours, and developmental editing 8-12 hours.Most students benefit from developmental or copy editing for major assignments and proofreading for final checks.