Definition
A GTIN, or Global Trade Item Number, is a standardised product identifier encoded in barcodes that includes formats such as UPC (Universal Product Code), EAN (European Article Number), and ISBN (International Standard Book Number).
Why GTIN matters for product feeds
Most shopping channels and marketplaces either require a GTIN or heavily favour product listings that include one. The reason is straightforward: a GTIN lets the channel match your product against its own product catalogue with confidence.
When you submit a product feed to a shopping channel, the platform uses the GTIN to verify that the product you are listing is the same product it already knows about. This matching process is critical. Without it, the channel cannot be certain whether your product data refers to the item in its catalogue or to a different variant, edition, or counterfeit.
Accurate matching means your product appears in the right place in search results, is grouped with genuine reviews and ratings, and qualifies for all available ad formats and promotional features. Inaccurate or missing GTINs create friction and limit visibility.
What happens when a product is missing a GTIN
If your product lacks a GTIN, the consequences depend on the channel and product category.
Some channels will reject the listing outright if the category requires a GTIN. Others will accept it but restrict it to a smaller subset of ad formats or search placements. For example, a product without a GTIN might be excluded from comparison shopping results or from eligibility for featured snippets. This limitation reduces the number of potential customers who see your product.
In competitive categories, a missing GTIN is a significant disadvantage. Customers searching for a specific product often filter by brand and model number, and channels use GTINs to power that matching. Without one, your listing becomes harder to find.
Product enrichment and inferred GTINs
Vendably's product enrichment capability can sometimes infer a missing GTIN from other product data you provide, such as brand, title, description, and MPN (Manufacturer Part Number). When enrichment successfully infers a GTIN, the value is flagged for your review rather than applied silently to your feed. This approach gives you visibility and control: you can verify that the inferred GTIN is correct before it is used to match your product in shopping channels.
Related terms
Understanding GTIN is easier when you also know related product identifiers and concepts:
- MPN (Manufacturer Part Number) is a unique identifier assigned by the manufacturer. It differs from a GTIN because it is not standardised across retailers and is not encoded in a barcode. Many channels accept MPN as a fallback when a GTIN is unavailable, though it is less reliable for product matching.
- Item group refers to a collection of related products that share the same base item but differ in variant attributes such as colour, size, or format. A GTIN identifies a single, specific variant within an item group.
- Product identifier is a broad term covering any field that uniquely identifies a product, including GTIN, MPN, SKU (Stock Keeping Unit), and ISBN. Different channels prioritise different identifiers depending on the product category.
When you prepare a product feed for submission to a feed destination, including accurate GTINs for every product is one of the most effective ways to ensure your listings match correctly and reach the widest possible audience.