(1) According to the external attributes of customers, this kind of stratification is usually the simplest and most intuitive, and the data is easy to obtain.

(2) Attribute stratification determined by internal factors of customers, such as gender/age/belief/hobby/income, is often used as the basis for stratification.

(3) According to the stratification of customers' consumption behavior, it can be considered from three aspects: recent purchase/purchase frequency and purchase amount.