The aim of this book is to discuss, through bibliographical research, how important quality customer service is for a company's growth, given that when you go to a company the first thing you look at is customer service. Salespeople are the first to convey the image of the organisation to the buyer, and if this doesn't happen in a way that satisfies them, in a clear and objective manner, the company loses not just one, but many customers. The company's growth depends, among other factors, on the service provided by the salesperson, thus guaranteeing the organisation's permanence in the competitive market. Quality is an element present in all aspects of human life. So it's no different with service quality, which is responsible for the company's continued growth, as well as achieving customer satisfaction. Quality service is extremely important because it is the salesperson who earns the trust and loyalty of the customer, so that the company can continue to operate and stand out from its competitors.