Addressing issues such as punctuation, grammar, syntax, spelling and consistency. A Copy Editor works to improve the quality and accuracy of the language in a project.
Assisting with structure and readability. From consult to rewrite, a content editor is usually more involved in the project to provide direction to achieve a better result.
Checking for sense and sensibility with a fresh pair of eyes. Often brought in to assess the finished product and conduct one final check before publishing.