The product category maps every product to one node in Shopify's Standard Product Taxonomy — the tree that powers Shop, Markets routing, and downstream channels like Google Shopping. This guide shows how to assign one taxonomy category to every matched product in a single run.

Category is a product field with one shape: pick from the taxonomy. No prefix/suffix, no find-and-replace, no formulas — it's a single typeahead picker. Every matched product gets the same category.

Don't confuse the two "Category" entries. The picker under Product Fields → Category is the Shopify taxonomy. The one under Google Shopping → Category is the legacy Google Product Category attribute. Different systems, different IDs. This guide is for the Product Fields one.

Step 1: Pick the Category field

In the Configure Product Edits panel, click Select Field. Category is the second item under Product Fields.

The Select Field modal with Category highlighted under Product Fields

Click it. The configuration panel switches to a Set the category search box.

Configuration panel after picking Category, showing an empty Search categories input below the Category field selector

That's the entire form for this field. There's no action dropdown — Category only does one thing.

Step 2: Search the taxonomy

Start typing in the Search categories… input. After a short pause the app queries Shopify's taxonomy and lists matching nodes by their full path.

Search categories input with "shirt" typed and a dropdown of matching Shopify taxonomy paths: Apparel & Accessories > Clothing > Baby & Children's Tops > Shirts, Clothing Tops > Shirts, Maternity Tops > Shirts, T-Shirts variants, Sports Fan Accessories > T-Shirts, etc.

Search the leaf, not the root. Typing apparel returns thousands of categories — the dropdown only shows the first batch. Type the most specific word that describes your product (shirt, mug, dumbbell, keyboard) to narrow the list.

Read the whole breadcrumb before clicking. Shopify has multiple "Shirts" — under Baby Tops, under Clothing Tops, under Maternity, under Activewear. They are different IDs and route to different storefront filters. Pick the one whose full path matches your products.

Click the row you want. The input collapses to that category's full path, and the Start Bulk Edit Now button activates.

Configuration panel with "Apparel & Accessories > Clothing > Clothing Tops > Shirts" set as the category, and Edit Preview on the right showing the existing TaxonomyCategory GID struck through with the new GID below

The Edit Preview on the right shows what changes per product: the existing taxonomy GID crossed out, the new GID below it. (See the gotcha note below — the preview shows internal IDs, not human-readable paths.)

After the run

Category changes are reversible from the History page using Undo.
Every matched product gets the same category. If you have a mixed catalogue, filter first (by Title, Tags, Type, etc.) so the run only hits products that genuinely belong in that taxonomy node.
The Edit Preview shows raw taxonomy GIDs like gid://shopify/TaxonomyCategory/aa-1-13-7, not human-readable paths. They're the truth — the picker maps your selection to that GID — but they're not the easiest sanity check. If you want a friendlier verification, click View … in Shopify admin on a preview row after the run completes; the product page shows the resolved category name.
Products that already have the chosen category are skipped (no-op update).
A small number of products in the test catalogue have gid://shopify/TaxonomyCategory/na — that's Shopify's "uncategorised" placeholder and a normal source value to overwrite.