This document discusses several theories of motivation. It begins by defining motivation and providing examples. It then outlines five major motivation theories: Maslow's hierarchy of needs, Herzberg's two-factor theory, McGregor's Theory X and Y, Alderfer's ERG theory, and expectancy theory. For each theory, it briefly explains the key aspects and how managers can apply them to motivate workers. The document concludes by stating it referenced information from the web, textbooks, and discussions with friends to compile the content.