The customer service that is most used in the world of private business and sales, as well as its equivalent, attention to citizens in the public sector, is the fact of receiving people who want to arrive with a purchase order or who are given a good or service and you have to do it well , the customer is one of the most important practices in marketing or marketing because a customer repeats satisfied five who were well cared for, instead a poorly attended and dissatisfied customer repeats it at ten with which we have to triple our good attention to equate bad attention, the art is in serving difficult customers and as it is said in Ecuador and elsewhere "know to have them" because there will always be at least ten percent of complicated people and who are not happy but also who seeks to make others unhappy be them and often have money and what the business owner is looking for is that that client leaves his money buying him something and that he also comes out satisfied or thinks he is believing or being convinced that what he bought will serve him or make him happy, the customer is always right and that is a maximum of the customer service to make him satisfied