Proofreading essays involves carefully reviewing a written piece to identify and correct errors in grammar, punctuation, spelling, syntax, and formatting. It also includes ensuring clarity, coherence, and consistency in the overall presentation of ideas. Proofreaders check for typos, awkward phrasing, word choice issues, and adherence to style guidelines if specified. They may also suggest improvements for clarity and flow without substantially altering the content or voice of the original work. Proofreading aims to polish the text, making it accurate, professional, and easy to read.