不要重複使用產品 ID：請勿讓多個產品共用 GTIN。單一產品只應對應至單一 GTIN，重複使用 GTIN 會導致市集目錄資料過時或不一致，因而造成混淆。如果從未經授權的來源取得產品 ID (例如其他公司破產清算程序中販賣的 ID)，等於讓您的產品識別資訊建立在原先註冊的產品或公司之上，徒增風險。
客製化產品請遵循相應的產品 ID 最佳做法：在特定情況下 (例如您的產品為手工、客製化或一次性產品)，品牌可採用自有方式來解決產品識別的問題，也就是使用專屬的庫存計量單位編號 (SKU) 或製造商零件編號 (MPN) 來管理產品。這類做法的重點在於，製造商的管理原則必須以專屬性、可供驗證和全球通用等三項特性為基礎，確保能受益於採用產品 ID 制度的優勢。
[[["容易理解","easyToUnderstand","thumb-up"],["確實解決了我的問題","solvedMyProblem","thumb-up"],["其他","otherUp","thumb-up"]],[["缺少我需要的資訊","missingTheInformationINeed","thumb-down"],["過於複雜/步驟過多","tooComplicatedTooManySteps","thumb-down"],["過時","outOfDate","thumb-down"],["翻譯問題","translationIssue","thumb-down"],["示例/程式碼問題","samplesCodeIssue","thumb-down"],["其他","otherDown","thumb-down"]],[],[[["\u003cp\u003eGoogle uses product identifiers like GTINs, MPNs, and brand names to understand and organize product information, enabling users to find relevant products in search results.\u003c/p\u003e\n"],["\u003cp\u003eBrands and manufacturers should ensure their products have unique GTINs assigned and submitted through Google Manufacturer Center to enhance product visibility.\u003c/p\u003e\n"],["\u003cp\u003eRetailers and third-party sellers need to provide accurate product data, including GTINs when available, and use structured data markup for better search engine understanding.\u003c/p\u003e\n"],["\u003cp\u003eOnline publishers should clearly identify products in their content using exact names, structured data with GTINs, and avoid inventing or borrowing identifiers to improve product discoverability.\u003c/p\u003e\n"],["\u003cp\u003eAccurate product identification is crucial for both online and offline commerce, ensuring businesses and consumers have a clear understanding of product origin and identity, which ultimately helps Google Search connect users with the right products.\u003c/p\u003e\n"]]],["Google helps users find products online by ensuring accurate product identification. Manufacturers should use unique Global Trade Item Numbers (GTINs) and avoid reusing identifiers. Retailers should submit high-quality product data, including GTINs, through structured data or product feeds. Publishers should use exact product names and structured data, including GTINs, to identify reviewed products. Accurate product identification, using systems like GTIN, MPNs, and brand names, is essential for businesses and consumers, and helps Google display the right products to the right users.\n"],null,[]]
