Master Fields: normalize your catalog once
Master Fields are shop-wide mapping rules for id, title, description, link, price, image_link and optional attributes that every channel reuses. Learn the editor, preview and copy tools.
Master Fields are a library of universal rules for a shop. You define how each attribute is produced once — from a source field, a static value, a combination, a lookup table — and every channel can reuse that rule. Fix a title problem here and all your feeds change together.
Required, optional and custom fields
| Group | Fields | Notes |
|---|---|---|
| Required | id, title, description, link, price, image_link | Always present. Unconfigured required fields are highlighted and open in edit mode. The id row is locked by default; click Unlock to change it. |
| Optional (recommended) | brand, gtin, mpn, condition, availability, google_product_category, product_type, color, size, material, pattern, gender, age_group, sale_price, shipping, shipping_weight, item_group_id, additional_image_link, custom_label_0 … custom_label_4 | Add from Add Master Field → Recommended Fields (searchable). |
| Custom | Any name you type | Add Custom Field; names are lower-cased and spaces become underscores (Warranty Years → warranty_years). |
Each group shows a configured / total counter.
Anatomy of a field row
From left to right:
- 1
Reorder arrows
Move the field up or down inside its group. - 2
Field badge
The attribute name; red when a required field is not configured. - 3
Action
Use,Add static value,Combine,Use lookup table,Extract fromorLeave empty, followed by its inputs. See Mapping rules. - 4
Apply to
All products,Only IForIF / ELSE. Conditions appear below the row. - 5
Edit values (pencil)
Opens Change values, the list of transformation rules. A badge shows how many rules exist.
Row actions (visible on hover): Preview, Edit Mode, Copy to Master Fields (duplicate an optional field as <name>_copy), Remove, Collapse. Comments and Search are marked coming soon.
Preview
Preview runs the mapping against a sample of your real products and shows the resulting value per product, together with the source fields used. Use it before saving to confirm a Combine or a condition does what you expect.
Copy from another shop
Copy from Another Shop imports every master field definition from another shop in your workspace into the current one (existing fields with the same name are overwritten in the editor). Click Save Changes to persist. This is the fastest way to onboard a second store with the same source format.
Saving
- Save Changes validates every edited field (incomplete conditions, lookup tables without a default value, incomplete IF / ELSE branches are rejected with a message) and saves.
- Save and Proceed saves and opens Channels.
- After a successful save, every channel of the shop is regenerated automatically so the Feed URLs pick up the change. The toast reports how many channels were regenerated.
- "You have unsaved changes" is shown until you save.
Example: Acme Outdoor Co.
| Master field | Rule |
|---|---|
id | Use $id |
title | Combine $brand + $title + $color + $size, separator " – " → Acme Outdoor – Trailhead Rain Jacket - Men's – Blue – M |
description | Use $description · Change values: *Strip HTML* |
link | Use $link |
price | Use $price |
image_link | Use $image_link |
brand | Use $brand |
condition | Add static value new |
availability | Use lookup table "Stock words" (in stock → in_stock, agotado → out_of_stock), default: use original |
custom_label_0 | IF $price is greater than 100 THEN static premium ELSE static standard |
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