Movements vs Shifts of Demand Curve

Movements along the demand curve and shifts of the demand curve describe two different changes in consumer behaviour. A movement along the demand curve happens when the price of the good itself changes, causing a change in quantity demanded. A shift of the demand curve happens when a non-price determinant of demand changes, such as income, tastes, prices of related goods, population, advertising, or expectations. In this case, the whole demand curve moves either to the right, showing an increase in demand, or to the left, showing a decrease in demand.