GTIN [gtin] Field for Product Feed

Required for each product with an assigned GTIN (Google & ChatGPT)

The gtin attribute allows Google to uniquely identify and classify products. GTINs improve your product’s discoverability and performance across Google surfaces.

When to use

• Required for all products with a GTIN assigned by the manufacturer.
• Also submit GTIN for store-brand or custom products if one exists.
• If unsure, do not guess a GTIN.

Accepted GTIN types:

• UPC (GTIN-12) — North America (12 digits)
• EAN (GTIN-13) — Europe (13 digits)
• JAN (GTIN-13) — Japan (8 or 13 digits)
• ISBN (GTIN-13) — Books (13 digits)
• ITF-14 — Multipacks (14 digits)

Format

• Type: Number (spaces and dashes allowed but ignored)
• Limits: 0, 8, 12, 13, or 14 digits
• Repeated field: Up to 10
• Schema.org properties: Product.gtin8, gtin12, gtin13, gtin14, isbn

GTIN formatting examples:

Minimum requirements

• Submit a valid GTIN as defined by GS1 standards.
• Ensure the check digit is correct using the GS1 Check Digit Calculator.
• Do not submit restricted prefixes (e.g. 02, 04, 2, 05, 98, 99).
• Use the correct GTIN for each variant (color, size, etc.).
• Don’t submit made-up or guessed GTINs.
• Don’t reuse GTINs for different products.

SEO Tip

A valid GTIN allows your products to surface more often, match with rich product data, and appear in relevant comparisons. Always prefer submitting it when available.

Official Source: https://support.google.com/merchants/answer/6324461