The initial product launch may be the only time that sales people get information about your product. Your sales people probably have more information about your competition's products and strategy than they do about your own. Think about it. How much time do your sales people spend learning about your product? And how much time do they spend learning about the competition? And being reminded constantly of the competition by their customers?
Sales people need to be schooled continually in the value of your product. By making product information available and accessible, you can give sales people the tools they need to help themselves. Read more in On-going sales education.