By default Nosto uses your product's Google Category when generating pixel events and product catalogues in Facebook. If your product doesn't have a Google Category or this is not included in the implementation, we fall back in the product's category, which according to Nosto's tagging structure, follows website's navigational hierarchy. The format commonly looks like something below, assuming product range Canoes is under sub-category Boats and under Outdoor main category on the website.
Google Category is a pre-defined and fixed taxonomy structure by Google which originally helps to ensure that your Google search ads is shown with the right search results. The same detail and taxonomy structure can be used to power dynamic ads also on Facebook. To demonstrate the difference, the same taxonomy following the Google Category structure for Canoes would be as below,
Sporting Goods > Outdoor Recreation > Boating & Water Sports > Boating & Rafting > Canoes
How to Map the Google Category
To set the Google Category, update your product tagging to set the google_category attribute to the appropriate value in the Google product taxonomy. You may either use a number (e.g. 1604) or description (e.g. Apparel & Accessories > Clothing). For more information about product tagging, please refer to our tagging guide.
How to Review the Google Category in Nosto Tagging
Use debug toolbar or review page source to review the tagging and format.
Common Errors and Debugging
When Google Category is not present and Nosto falls back to regular category, Facebook still tries to interpret the product category following the Google standard. By default this is harmless and caused by a mismatch between expected value, which might trigger notification emails or similar updates when logging in to business manager. You can adjust the notification settings in business manager to tune down unnecessary notifications, which can be triggered multiple times a day as Nosto updates your product catalogue automatically when changes occur in your shop platform (e.g. product availability, price)
Mapping Google Category accordingly for Facebook ads might improve ad delivery as it could help Facebook to interpret taxonomies following Google's standard, but on the contrary it doesn't have a negative impact nor it prevents running dynamic product ads.