This document provides an overview of various theories of motivation. It discusses early theories like Maslow's hierarchy of needs theory, Herzberg's two-factor theory, and McGregor's Theory X and Y. It also examines content theories that focus on needs like ERG theory and acquired needs theory. Process theories explained include equity theory, expectancy theory, and reinforcement theory. The document also covers goal-setting theory, job design approaches, and the job characteristics model for designing motivating jobs.