Hello! To add a store to your favorites on Taobao, follow these steps:

1. Open the Taobao app or web version, and find the "Add Store to Favorites" button on the store page you want to add to your favorites.

2. Click the "Add Store to Favorites" button to add the store to your favorites.

3. If you haven't logged into your Taobao account, the system will prompt you to log in before you can add a store to your favorites.

4. In your personal center, you can find "My Favorites", which contains your favorite stores and products.

I hope this helps!