The success of any company is the right strategy of customer service. The business grows with the increasing of customer base and the strengthening relationship with consumer. Customer satisfaction is a key factor to achieve and maintain the company’s competitiveness. In this regard, more and more actual task is to know the customer “by sight”, to have a complete idea of what, when and in what volume did he buy and how he is satisfied with your cooperation. This information allows to predict consumer behavior and to define prospects for further development of relationship. The objectives of the analysis can be: The ways of customers’ base are the follow: The ranking of customers – is a simple way which allows constructing the customers in a certain sequence. It increases the efficiency of the company by the focusing on the most “valuable” consumers. Segmentations of customers. Segmentation is the useful tool of analyst of customer behavior. It is necessary to work with each of the consumer group in a special way. Distribution of customs on segments is a basis for strategy creation of the enterprise. In the widest sense consumer segmentation is a detailed study of customers’ tastes and analysis of their behavior on the basis , of which it is possible to give answer for interesting question: *Who will buy my goods? *What do they want to buy? *Where do they want to buy? *How do they know about the products? *Why should they buy me products not commodity competitors?