It means that the demand for a good or service is greater than the availability of the good or service. Therefore, scarcity can limit the choices available to the consumers who ultimately make up the economy. Scarcity is important for understanding how goods and services are valued.
There are three chief causes of scarcity in the economy: Demand scarcity: When there's a high demand for a resource or product, because of increasing populations or changes in preferences. Supply scarcity: When the supply or resource is low or out, due to weather, disasters or resource depletion