This document summarizes Herzberg's Motivator-Hygiene Theory of motivation. It describes how Herzberg interviewed engineers and accountants about times they felt good or bad at work, identifying motivators like achievement and recognition that enhance satisfaction, and hygiene factors like salary and job security that prevent dissatisfaction. The theory holds that addressing hygiene factors leads to neutral job attitudes, while addressing motivators increases satisfaction. Though criticized, the theory remains influential in defining intrinsic and extrinsic motivation and is applied today in web design and e-learning. The author describes applying the theory by seeking more responsibility and positive feedback in their graduate assistant athletic trainer role.