Now-a-days in every industry, companies are moving toward the goal of understanding each customer individually and using that understanding to make it easier for the customer to do business with them rather than with competitors. In this paper it is shown how focus is changed from broad market segments to individual customers. It takes more than data mining to turn a product-focused organization into a customer-centric one. Data mining is a collection of tools and techniques. It is an attitude that business actions should be based on learning, that informed decisions are better than uninformed decisions, and that a methodology for applying the tools and techniques.