Business rules are predefined conditions and actions that automatically transform product data within a feed — categorizing items, rewriting titles, adjusting prices, or excluding products — based on criteria a merchant sets once and lets run continuously. Rather than manually editing each product, a business rule works in the background: if a product's margin falls below a threshold, exclude it from the feed; if a title is missing a size, append it automatically.

Why It Matters for Feed Management

Catalogs change constantly — new products get added, prices shift, suppliers update descriptions — and a business rule keeps those changes handled consistently without anyone having to notice and fix each one manually. This matters most for standardization: a rule that strips promotional language out of every title, or maps a supplier's inconsistent category names onto Google's product taxonomy, applies the same logic to every product that matches its condition, including ones added after the rule was created. That consistency is a large part of what separates a feed that performs well from one that quietly loses visibility due to disapprovals or poor categorization. Business rules are also how merchants push deeper, more granular control into a channel's data than a standard feed template allows, which is the specific use case covered in our guide on unlocking advanced data control with Google supplemental feeds.

How It Works

A business rule is generally structured as a condition and an action: "if category equals 'clearance' and inventory equals 0, then set availability to out of stock" or "if brand equals 'Acme' then append 'by Acme' to title." Feed platforms evaluate these conditions against every product in the catalog each time the feed is processed, applying the corresponding action wherever the condition matches. This is closely related to — and often built on top of — bulk editing, except a bulk edit is typically a one-time manual action while a business rule keeps re-applying itself automatically as the underlying catalog data changes. Business rules are also a core mechanism for normalization, since they're what reconcile inconsistent supplier data — different casing conventions, inconsistent units, varying category names — into the standardized format a channel expects.

Example

<item>
  <g:id>SKU-73310</g:id>
  <title>Acme Cast Iron Skillet - 12in, Seasoned</title>
  <g:google_product_category>Home &amp; Garden &gt; Kitchen &amp; Dining &gt; Cookware</g:google_product_category>
  <g:price>39.00 USD</g:price>
  <custom_label_3>rule_applied_title_brand_prefix</custom_label_3>
</item>

The brand prefix in the title and the standardized google_product_category mapping here were both applied automatically by business rules acting on raw supplier data, rather than typed in manually for this individual product.

Related Concepts

Business rules are what make bulk editing durable rather than a one-time fix, and they're a primary tool for normalization — reconciling messy supplier data into a consistent, channel-ready format. Applied well across a catalog, business rules are frequently the difference-maker behind feed optimization work, since most performance gains come from fixing the same structural issue across every affected product rather than improving listings one at a time.