My proofreading service involves me reading your manuscript and highlighting things like punctuation, grammatical and typographical errors. I'll also let you know if your sentence structure or paragraph structuring is weak and suggest ways to improve it. Proofreading goes hand in hand with my editing service. Not only will I pick up on the errors but I'll correct them myself. I'll also look at things like dialogue, speech tags and use of language. I'll take care of these things myself but if I think an area involves a bigger re-write then I'll let you know and suggest you take another pass at it.