Proofreading is the little sibling of editing. It runs around after editing, bleating to be allowed to play and promising to be good.
Proofreading is the last stage in the overall editing process. Its purpose is to pick up errors in grammar, punctuation and spelling, layout, formatting, consistency and other aspects that may have been overlooked during editing.
Most of the time, writers think that, after their work has been through an editor’s hands or they themselves have edited the work, all that is needed is a little light proofreading. In my experience, especially if you are a first-time author, your work will need a more thorough review and revision.
However, if you’re sure that proofreading is what you want, I’m here with my virtual pencil, ready and willing to do as you ask.