Employee retention is the phenomenon by which employees remain within an organization for a specified duration, signifying the inverse of voluntary turnover. As a central concept and research domain in human resource management and organizational behavior, it systematically investigates the myriad factors influencing an employee's decision to continue employment, encompassing organizational practices, environmental conditions, and individual attributes. This field critically examines strategies designed to foster employee commitment, engagement, and loyalty, recognizing their profound impact on organizational stability, performance, and the preservation of institutional knowledge.