The following are 6 steps:

1. Log in to your Shopee seller account.

2. Find the "My Store" module on the Shopee homepage and click "Store Introduction" to enter the store introduction page.

3. On the store introduction page, find the location of the store avatar and click the "Edit" button.

4. Select a suitable picture as the store avatar as needed, and ensure that the picture is clear and relevant to the store's name and product category positioning.

5. After uploading the picture, adjust the size of the picture as needed to ensure that it is displayed properly in the avatar frame.

6. After adjusting the avatar, click the Confirm or Save button to update your store avatar.