Relationship marketing is designed to create, maintain, and enhance strong relationships with customers. It is important because it costs five times as much to attract a new customer than retain an existing one, and it is easier to sell additional products and services to existing customers. Relationship marketing involves developing customers from suspects and prospects to advocates and partners through various levels of investment and engagement. The goal is to increase customer lifetime value by improving satisfaction, loyalty, and increasing the share of the customer's purchases. CRM systems can help by allowing the tracking and analysis of customer data to better target marketing, sell additional products and services, and predict customer needs and potential defection.