The business description can be a few paragraphs in length to a few pages, depending on the complexity of your plan. If your plan is not too complicated, keep your business description short, describing the industry in one paragraph, the product in another, and the business and its success factors in three or four paragraphs that will end the statement.
While you may need to have a lengthy business description in some cases, it is our opinion that a short statement conveys the required information in a much more effective manner. It doesn't attempt to hold the reader's attention for an extended period of time, and If the business description is long and drawn-out, you will lose the reader's attention.
A good description will increase your visibility in our site, although it shouldn't surpass the 5000 characters limit.