How to fix seo product missing gtin on Squarespace

Steps for Squarespace

1. In your Squarespace admin, go to Commerce → Inventory → select a product.
2. Squarespace does not have a native GTIN field. To add GTIN to structured data, go to Pages → select the product page → click the gear icon (Page Settings) → Advanced → Header Code Injection.
3. Paste a JSON-LD Product schema block containing the 'gtin' and 'mpn' properties for that specific product into the Header Code Injection field.
4. For site-wide or automated injection, use a third-party SEO plugin compatible with Squarespace (check the Squarespace Extensions marketplace for 'SEO' tools that support structured data customization).
5. Verify the injected schema using Google's Rich Results Test on the product URL.

{
  "@context": "https://schema.org/",
  "@type": "Product",
  "name": "Example Running Shoe",
  "gtin": "012345678905",
  "mpn": "RS-2024-BLK-10",
  "brand": {
    "@type": "Brand",
    "name": "Example Brand"
  },
  "offers": {
    "@type": "Offer",
    "price": "99.99",
    "priceCurrency": "USD",
    "availability": "https://schema.org/InStock"
  }
}

What is seo product missing gtin?

A GTIN (Global Trade Item Number) is the universal product barcode identifier — the same number printed on a product's UPC, EAN, or ISBN barcode. An MPN (Manufacturer Part Number) is the code the brand uses to identify a specific product variant. When you add these identifiers to your product pages inside structured data (the hidden JSON-LD code that tells Google what your page is about), you're giving Google a precise, unambiguous signal that says "this page sells this exact, real-world product." Without them, Google can only guess what product you're selling based on text alone.

Google's Shopping Graph — the database powering Google Shopping, product panels in Search, and AI-driven shopping features — matches product pages primarily by GTIN. Without a GTIN in your Product schema, your listings are far less likely to appear in Google Shopping free listings, merchant-driven product carousels, and the growing wave of AI shopping summaries that pull structured product data. Stores that supply GTINs consistently win more impressions and clicks in Shopping surfaces at zero additional ad spend. There is also an indirect ranking benefit: Google's quality guidelines treat missing GTINs as incomplete product markup, which can reduce your eligibility for rich result enhancements.

See the complete Seo product missing gtin guide for every platform and the full background.