No file
Start with a product admin CSV export (a productId column is required).
Product categorization
Upload an export from product admin. For each product you get suggestions from your taxonomy index—you choose what fits, including when you’re unsure or a category is still missing.
Then export a bulk-import file: two columns, productId and categoryId, ready to load back into the product admin.
1Choose CSV & start stream2Pick a category per product3Export for import