On the most basic level, content editing helps you determine that your book or story has been written in the same point of view throughout, and that it is in the most appropriate point of view for the context. It will help identify incorrectly used analogies, similes, and metaphors, and less than stellar examples. A basic content edit will also ensure that the content is in the correct order, such as that facts are presented consecutively and the plot doesn’t backtrack (unless on purpose).
There are many other questions about the clarity of your writing that can be answered by a thorough content edit:
Content editing will also help you decide if anything is missing.
If you are working with a publishing company, you might find that they employ a content editor or offer the services of one to you. However it is not recommended to rely on your editor or publisher to provide this for you, especially if you have not been published or have not previously worked with the company. When querying agents and editors for fiction work, assume they are looking for a finished, polished product. (When querying for non-fiction work, you will often query first and write after the project has been approved. Most agents and editors will consider only completed fiction works.)
If you don’t have access to a content editor, you may be able to find a freelance editor who is willing to review your manuscript for content errors and suggestions. At the very least, read your writing aloud to check for the flow of ideas and pass it on to someone you trust. Another person is most often able to find all those nagging details that a reader unfamiliar with the story is most likely to trip up on.
Content editing can be tedious, but it is an important part of the editing process. By reviewing your manuscript for clarity and consistency, you will be better prepared to offer agents and editors your finished product.
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