Herzberg refers to Frederick Herzberg, an American psychologist best known for his work in the field of motivation and job satisfaction. He developed the Two-Factor Theory, which identifies two sets of factors that influence employee motivation: hygiene factors and motivators. Hygiene factors, such as salary and working conditions, can lead to dissatisfaction if not addressed, while motivators, like recognition and achievement, can enhance job satisfaction. Herzberg's research emphasized that improving hygiene factors alone does not lead to higher motivation; instead, organizations must also focus on enhancing motivators to foster a more engaged and productive workforce. His theories have significantly influenced management practices and human resource strategies.