HRM involves planning, recruiting, selecting, training, developing, compensating, and maintaining the workforce. The key functions of HRM are acquisition, training, appraisal, compensation, labor relations, health and safety, fairness, motivation, and maintenance of employees. HRM helps achieve organizational goals through strategic workforce planning and developing high-performance work systems. Emerging trends shaping HRM include globalization, technological changes, workforce demographic shifts, and a need for more strategic and evidence-based approaches.