What is the definition of business circle? What kinds of business districts are there in the store?

The sales activities of any store are restricted by certain geographical conditions, which are the radiation range formed by taking the location of the store as the center and expanding around along a certain distance, which is called business circle.

The business circle of a store is generally composed of three parts: the main business circle, which is the closest area to the store and has a highly dense customer base. Usually, 55%-70% of customers in the store come from major business districts; The sub-business circle is located outside the main business circle, and the customer density is sparse, with about 15%-25 customers. Marginal business circle refers to the area outside the secondary business circle, where customers are sparsely distributed, shops are less attractive, and smaller shops have almost no customers in this area. Because the professional market is wholesale, the scope of business circle is very large, which depends on the scale and management level of the professional market. I also saw it in the MBA think tank file. I don't know if it's right.