When copy editing, you do a thorough readthrough of a text and make sure that it's understandable and that the intended message of the text is clear. You look at word choice and sentence structure, as well as everything that's part of a proofreading, such as grammar, spelling mistakes and punctuation errors. Is the message of the text clear or must changes be made for it to be understood by the target audience?
I offer copy editing of texts in Nynorsk, Bokmål and English. Contact me for my rates.