Warehouses designate storage areas for merchandise. What we call warehouses in WebStore can also correspond to physical stores. This enables, for example, a chain of stores to classify each store as a warehouse and identify the stock of each product that exists in each store. Every warehouse is assigned to a tax zone. This is mandatory because certain sellers in European countries can choose to apply origin-based taxes. Warehouses are identified in terms of the seller and are therefore shared among the different stores of the same seller.