Customer service is a an ability to serve and treat customers in the best possible way with utilisation of the several technics.. In business, people are focusing on products, lowering prices, attracting new customers, forgetting that what counts is how (service) and not just what (product). Good customer service means that a bond is created between the business and the customer. Even if the customer "goes away" (because, for example, it was a one-time purchase), he will talk about his positive experience to others. If it happens that our business is interesting to others, it is not enough that you have sold, you still have a new customer.