Management involves getting work done through others efficiently and effectively to accomplish organizational objectives. The four main functions of management are planning, organizing, leading, and controlling. There are different types of managers including top managers who set overall direction, middle managers who implement strategies, first-line managers who oversee entry-level employees, and team leaders who facilitate team activities. Managers fulfill various roles such as figurehead, leader, and liaison. They require technical, human, and conceptual skills. Developing people can provide competitive advantages through practices like employment security, selective hiring, and sharing information.