One key feature of post-launch product management is having a fully trained, knowledgeable, and enthusiastic sales force. It is important to keep a sale and advertising team up to date but also well-informed on the product because if a sales person cannot answer questions about the product, then the customer that they are trying to sell it to will not trust them, or the brand, resulting in a loss of sale. Furthermore, if a salesperson cannot get excited about the product themselves, it can fail to sell well, resulting in poor market performance. This is sometimes demonstrated on the popular show, Shark Tank, where inventors present their idea to a team of investors, in hope to gain additional funds for their product. When an inventor is not excited about the product, it can often be seen by investors, causing them to back out of a deal that would have otherwise taken place, had the inventor been more enthusiastic and knowledgeable about the product and its market.