[null,null,["最后更新时间 (UTC)：2025-07-25。"],[[["\u003cp\u003eProduct identifiers, such as GTINs, MPNs, and Brand, are crucial for merchants to distinguish their products and improve search visibility on Google Shopping.\u003c/p\u003e\n"],["\u003cp\u003eProviding accurate product identifiers helps validate products against Google's catalog, enhancing product data and potentially increasing clicks and impressions.\u003c/p\u003e\n"],["\u003cp\u003eWhile GTINs are highly recommended and sometimes required, if a product lacks valid identifiers, leave the identifier attributes blank, prompting the merchant to update them through error notifications.\u003c/p\u003e\n"],["\u003cp\u003eAvoid using the \u003ccode\u003eidentifier_exist\u003c/code\u003e field as it doesn't encourage merchants to provide the necessary identifiers for optimal product listing.\u003c/p\u003e\n"]]],[],null,["Identifiers\n-----------\n\n### Introduction/Business Impact\n\n*** ** * ** ***\n\nProduct identifiers are essential for your merchants to define the product they are selling in the global marketplace. They uniquely distinguish products merchants are selling and help match search queries with their products. Identifiers are used to match against Google's product catalog to ensure product validity.\n\nIn addition, it allows your merchants to leverage Google's catalog to be able to have the richest data to maximize the number of clicks and impressions.\n\n### Tech Guidance\n\n*** ** * ** ***\n\n#### Understanding which product identifiers are most important\n\nTo ensure validity for each product, include unique identifier attributes in the [Product identifiers](https://support.google.com/merchants/answer/160161) group for each product. Unique identifiers include:\n\n- The product's [Global Trade Item Number (GTIN)](https://www.gtin.info/), also known as a Universal Product Code (UPC). We recommend for merchants to prioritize providing this identifier to expect the best potential results\n- [Manufacturer part number](https://support.google.com/merchants/answer/6324482) (MPN)\n- [Brand](https://support.google.com/merchants/answer/6324351)\n\n| **Important:** GTIN is required if the condition is new, availability is in stock or out of stock, or the merchant is not the unique seller.\n\n#### Implementation of products with identifiers\n\nIf a product has a unique identifier, you can pass this data on behalf of the merchant to the corresponding identifier attribute. If the initial value provided is incorrect, there will be a product disapproval which will appear and the merchant should have the ability to fix this through their product catalog.\n\n#### Implementation of products without identifiers\n\nIf a product doesn't have assigned product identifiers that meet the [requirements](https://support.google.com/merchants/answer/6324478), then leave it blank. This will trigger the item demotion or disapproval, which should drive the merchant to update the corresponding identifiers where [*Offer Level Errors and Warnings*](/merchant/storebuilder/online/sections/3_2_1_errors_and_warnings) appear.\n\nThere is a field called [`identifier_exist`](https://support.google.com/merchants/answer/6324478), we recommend not to use this because it doesn't drive merchant action to update the necessary identifiers."]]
!['gtin' [GTIN]](https://google-developers.gonglchuangl.net/static/merchant/storebuilder/images/blueprint/gtin.png?hl=zh-cn)