You've been asked to make a speech, write a report, do a press release. You've drafted it, but you're not happy with it - and haven't the time to sort it out properly. The writer will take your drafts and edit them to suit the audience or readership specified. This can be a quick and relatively inexpensive way of improving your presentations: anything from advertisements to books. Editing can be charged by time or by fee-for-job.
The complexity and scale of projects varies so much it is difficult to predict costs before a briefing. Daily rates may fall between £300-£500 or more: a minimum charge for small editing jobs would usually be £100.