A quota is a physical restriction that a government or an organization imposes on the quantity of goods that can be imported or exported from a country or a region. It is a limit on the number of goods that can be traded, usually to protect domestic industries from foreign competition or to regulate the flow of goods.
For example, a country might impose a quota on the number of cars that can be imported in a year, or limit the amount of sugar that can be exported. This means that once the quota limit is reached, no more goods of that type can be imported or exported until the next period. Quotas can be used to manipulate the supply and demand of goods in a market, affecting their prices and availability.