What does a movement along the demand curve mean?

A movement along the demand curve refers to a change in the quantity demanded of a good or service resulting from a change in its price, while all other factors remain constant. If the price decreases, there is an increase in the quantity demanded, which is represented by a movement down the curve. Conversely, if the price increases, the quantity demanded decreases, resulting in a movement up the curve. This illustrates the inverse relationship between price and quantity demanded, as described by the law of demand.