In your WebStore Manager, from the Products menu, choose Product Feeds:
Next, select Google Merchant Center:
On this page, enter dummy as the username and dummy as the password, fill out the currency field at a minimum, then click Save:
If you like, you can also:
- Add additional field mappings via the Field Mappings tab
- Choose departments / categories / subcategories to be excluded from the Item Exclusion tab
- Map your store’s navigation structure to Google’s official taxonomy with the Google Categorization tab.
Once saved, your feed will be generated nightly and will be available via your FTP account. (Check back the following morning to find the file.)