The reason for this is the following：

1, the operation process is relatively fixed and easy to use. The cashier's work mainly includes receiving customers, selling goods, processing orders and collecting money. These processes are relatively fixed, and employees can get started quickly after training.

2. The work content is relatively simple and easy to master. The cashier's job is mainly to deal with customers and handle some basic sales and collection affairs. It does not require high professional skills and is relatively easy to master.

3. Working hours are relatively flexible and can adapt to different needs. The cashier's working hours are generally flexible, which can be adjusted according to the size of passenger flow and the needs of the store, and can adapt to different work needs.

4. The industry has broad prospects and many development opportunities. With the development of economy and the expansion of consumer market, the prospect of retail industry is getting broader and broader, and cashiers also have many opportunities in career development, such as being promoted to store manager and sales supervisor.