If you're used to briefing copywriters you can skip this bit.
A good copywriter knows about marketing, understands how brands work, can help create concepts for your ads, and will even come up with names for your products.
To get the best return on your investment, you need to:
hire us as early in the process as possible
provide us with a clear brief and as much information as possible
make sure all copy is approved by one person and not by a committee