Tell the client how your product fits his company's needs. Identify several ways that your product can fill a void or boost profits for his company. Be specific and focus on what the company values; for example, if the client's main goal is to improve customer service, don't just tell the representative how your service can increase his bottom line.
Give as many details as possible to answer the client's questions before he asks them. If your product is very technical, make good use of visual aids to walk the representative through this section of the presentation. Give real-life examples of how your product has helped similar customers.