A customer success manager is the primary point of contact for clients of companies that provide online sales and services. As a customer success manager, your responsibilities include onboarding new clients, nurturing customer relationships, and providing value to your clients. Your job duties also include opening new accounts, responding to customer inquiries, educating customers about products and services, and leveraging data analysis to develop solutions. Depending on the company's size and scope, you may have a specified caseload of client accounts, or you may handle all customer relationships.