If consumption changes because of a change in a factor other than the price level, then the: AD curve shifts
In the field of Business, aggregate demand curve shows the quantity of goods and the price level of these goods. It represents the impact that the quantity of a product has on the price level of the product.
A change in the consumption of any good will impact its quantity. Based on the quantity changings the price level of the good will also change. Hence, in such a case, a curve shift in aggregate demand curve can be seen.
For example, if a product in a market becomes more desirable, its price level will increase. This will cause the aggregate demand curve to shift.
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