For Taobao sellers, they can use Alibaba Group's tool - Alitrip plug-in to view peer categories.

The Alitrip plug-in is a tool that allows sellers to quickly view competitor category information and sales data, designed to help sellers analyze the situation of market competitors. It provides a range of functions, including category rankings, sales data, competitor prices, etc., which helps sellers understand the market conditions and competitive situation in their industry.

To use the Alitrip plug-in, Taobao sellers need to register on the Alibaba Group's open platform and download the plug-in. After installation, the Alitrip plug-in can be found in the Taobao seller backend and used to view relevant data of peer categories.

Please note that the Alitrip plug-in may be updated and modified. It is recommended to check the latest official guidelines and requirements before use to ensure that the plug-in can be used correctly.