Product schema missing GTIN/MPN - reduced AI Shopping eligibility
GTIN (a Global Trade Item Number, covering UPC, EAN and ISBN formats) and MPN (Manufacturer Part Number) are standard product identifiers that let shopping platforms match your listing against external product databases. This check found your Product schema present but missing both, so there's no identifier tying your listing to the broader product catalogue these platforms use.
Why this matters
Shopping platforms, including Google Merchant listings, commonly use a GTIN or MPN to match your product against external catalogues for price comparison and availability. Without one, your product may match less reliably or be ineligible for some shopping features. Requirements differ by platform, so check each one's current documentation.
How to fix it
Your developer needs about 1 day to add this across the catalogue. Add the appropriate GTIN field, depending on the identifier format you have, to every Product schema block, sourced from your supplier. For private-label products with no GTIN, an MPN (a manufacturer part number you assign in-house) is an acceptable substitute.
Turn website findings into an action plan
Create an account to start a Full Audit of your website, with supporting evidence and a prioritised action plan.
Start Full Audit