Believe it or not, it doesn’t really matter. I’ve written for a broad range of businesses across many different industries. Whilst I have better knowledge of some industries than others, it’s not actually necessary to have experience of a business area. In fact, not having any prior knowledge at all can be an advantage. After all, you want anyone who reads the finished copy to be able to understand it. That includes the average Joe (or Jo!), who will not know anything about your business.