Proofreading is the process of finding errors that were either missed from automated software applications or introduced during editing. The job of a proofreader is to safeguard against errors being present on the document's final draft when it is submitted for publishing. These errors can include subject-verb agreement, formatting issues, and incorrect word choice. Even after running your document through software that may be included on your device, the above-mentioned issues and typographical errors can go unchecked.