As a small business startup, you may be wondering what GTIN is and whether you need it. Here's what you need to know. GTIN, or Global Trade Item Number, is a unique identifier for products that helps traders and retailers track items worldwide. If you're selling products online or plan to in the future, you'll likely need a GTIN to do so. Luckily, there are several ways to obtain one. gs1us.org is the official website of GS-One, a subsidiary of GS-Marketing which administers