A Taobao main account refers to an account used to log in to the Taobao website after registering on Taobao and completing personal information. It is the core identity of the account for transactions and other activities on Taobao, and it is also a prerequisite for the account to buy and sell goods on the Taobao website.

A Taobao sub-account is a subsidiary account under the Taobao main account, which can be created and authorized by the Taobao main account to achieve some specific functions or provide certain services.

A Taobao sub-account can operate through authorized roles, such as representing a company, store or product operator, etc., to facilitate multiple people to jointly operate Taobao stores, making store operations more efficient and convenient. In short, Taobao main accounts and Taobao sub-accounts have different functions and attributes, and there is a parent-child relationship between them. The Taobao main account is a necessary identity for conducting activities related to the Taobao website, while Taobao sub-accounts can play different roles in specific scenarios to achieve more efficient operations and services.