This paper provides a comprehensive review of Customer Relationship Management (CRM) strategies and technologies. It examines the evolution of CRM, from its historical roots to the modern-day shift towards relationship marketing. The paper explores key strategies in CRM, including customer acquisition, retention, and loyalty programs, highlighting their importance in enhancing customer relationships and business performance. It also discusses the role of technologies such as CRM software, data analytics, and integration in CRM implementation, along with the challenges faced and lessons learned. Furthermore, the paper explores future trends in CRM, focusing on the impact of AI, personalization, and omni-channel CRM on customer experiences. Case studies are presented to illustrate successful CRM implementations and the challenges encountered, offering valuable insights for practitioners and researchers in the field. Overall, this paper aims to provide a comprehensive understanding of CRM and its implications for business success.