Proofreading is an editing technique that finds and corrects errors in an already written piece of text. (For example, a business letter, essay, Web page, or report.) The proofreader checks the text's grammar and punctuation, spelling, word choice, and organization. Proofreaders also check for consistency in spelling and use of company-specific terms. Proofreaders also read the text aloud to check for hearing, voice, and tone errors.