Rewriting

A dramatic overhaul to existing text, often required for copy that has been translated from another language.

Web editing

Checking and amending copy to make it suitable for the web.

Proofreading

A final check on copy for consistency in usage and layout, for accuracy in the text and references and for typesetting errors.

Copy-editing

Correcting errors in spelling, grammar, punctuation, style and usage as well as checking the suitability of text for the intended audience, content and structure, sentence and paragraph length, illustrations and tables, legal issues and consistency.

Copywriting

Writing the words that promote a person, business, opinion or idea, usually for sales and marketing related materials.