The Taobao store main account has all the store operation permissions, and the sub-account can be seen as the clone of the main account with various permissions.

The main account can handle customer service and operations, but when you open a sub-account, you need to choose the sub-account position type.

The categories include customer service and operations. You can only choose one position at a time. If you choose customer service, then the account can only handle customer service and cannot operate the store products. If you choose operations, then you have more permissions, including the permission to handle customer service.