Shopify has a product category. Google has a Google product category. They sound like the same field, but they come from two different lists and do different jobs. Here is how they differ, how product type fits in, and when you need to set each one.
Two taxonomies, two owners
Shopify's product category comes from Shopify's Standard Product Taxonomy. The Google product category comes from Google's own product taxonomy. Each product gets one value from each list.
| Field | Where it comes from |
|---|---|
| Shopify product category | Shopify's Standard Product Taxonomy |
| Google product category | Google's product taxonomy |
| Product type | A label you write yourself |
What the Shopify category does
Shopify says every product should be assigned a category, and a product without one is saved as uncategorized. Shopify can suggest a category from the product's name, description and images, and you can accept it or pick a more specific one.
- Attributes: The category unlocks category metafields such as size, color or fabric
- Organization: You can use it as a condition in collections and as a product list filter
- Tax: With Shopify Tax, the category helps decide the tax rate at checkout
- Channels: Sales channels may need a standardized category
What the Google category does
In Merchant Center the Google product category is optional. Google assigns every product a category automatically, and the attribute exists so you can override that choice. Google accepts either the category ID or the full path, not both, and only one category per product.
- Category rules: Some categories, such as Apparel & Accessories, bring extra required attributes
- Campaigns: You can organize Google Ads campaigns by category
- Restricted goods: Alcohol has to sit in the correct alcohol category
Shopify's help for the Google & YouTube channel says you should add a Google product category, because the automatic assignment can lead to errors.
Where product type fits
Product type is separate from both. In Shopify it is a custom field you define for your own organization. Google also has a product type attribute, which is optional and holds your own categorization. Google uses it to help you organize bidding and reporting in Shopping campaigns, not to classify the product.
- Google product category: Google's list, used to classify the product
- Product type: Your list, used for your own structure and reporting
Picking the right value
Google's guidance is to choose the single category that matches the product's main function, and to go as specific as the list allows. A charger for an MP3 player belongs in MP3 Player Accessories, not in Electronics.
- Check suggestions: Review automatic categories on products where an attribute requirement matters, such as clothing
- CSV imports: Shopify's product CSV has one column for the Shopify category and a separate one for the Google category
- Existing Google values: Shopify maps a Google category to a Shopify one only on an exact English match or an ID
Doing this at scale
FeedFix checks every product against Google Merchant Center and Meta Catalog rules and scores each one 0 to 100 per channel, so you can see which products need attention. It drafts compliant title and description rewrites that you review as before/after diffs and apply in bulk, with every change audit-logged. See FeedFix.