Fortunately or unfortunately, people judge products and services by the way a sales rep presents them before a buying audience. People's perceptions about the company are formed based on the sales presentations they attend. This is a stage where the personality of the sales person comes in to consideration along with the product. The way the sales person speaks, what they says, how they answers questions, and how they dispels doubts all fall under scrutiny. An effective sales presentation can enhance the reputation of the company, help form a high opinion about the products, and can lead to sales of the products. As you speak out of conviction the feeling of authenticity gets transmitted and the audience starts to believe what you are saying. This could open the gates to future sales opportunities for which you are ultimately aiming.