Follow these steps to create a merchant group:

1. Log into your account
2. Click the “Merchant Group” link from the left hand navigation
3. Click “Add New Merchant Group” button. A dialog pop up will appear
4. Give the merchant group a name
5. Click the “OK” button
6. On the resulting page, use the search panel on the left hand side to find merchants you want to add
7. Click the check box next to each merchant you want added to the group. Changes are saved automatically.

You can now use this merchant group to filter products in your product searches. Just select your group from the Merchant Group drop down in the search panel.