google_product_category formatted incorrectly

Pinterest accepts Google's taxonomy in the google_product_category field, but only when it follows the official format. Errors 157 and 158 mean the value doesn't match the taxonomy and the row is demoted in ranking.

Common formatting errors: using just a leaf name ('T-Shirts' instead of the full path), using the wrong separator (slashes instead of '>'), submitting a free-text category, or using an outdated taxonomy ID that Google retired. Pinterest revalidates against the latest Google taxonomy each ingestion.

1. Download Google's current product taxonomy and find the exact full path for each product.
2. Use either the full text path ('Apparel & Accessories > Clothing > Shirts & Tops') or the numeric ID, not both.
3. Use ' > ' as the separator with surrounding spaces - not '/' or '|'.
4. Map your internal categories to Google's taxonomy with a lookup table you maintain quarterly.
5. Re-upload the feed and confirm warnings 157/158 clear.

• Submitting only the leaf node like 'Shirts & Tops' instead of the full ancestor path
• Using a deprecated category ID that Google removed in the latest taxonomy update
• Inserting custom internal categories that aren't in Google's taxonomy at all