GTINs are the most important Product Identifier when it comes to Google Shopping. They're used to connect products to relevant shoppers and enrich product listings with important details like product reviews.

GTINs come in two options: single-quantity GTINs and Company Prefixes. While single-quantity GTINs are cheaper, the decision to opt for a Company Prefix should not purely be based on immediate cost savings. It's crucial to recognize the limitations of single-quantity GTINs before purchasing.

GTIN stands for Global Trade Identification Number (GTIN) and is an internationally recognized system developed by GS1 to identify products in the global marketplace.

The first thing to know about getting GTINs is that you have to go through an official organization called GS1 to get them. You cannot assign GTINs to products yourself.

Product Identifiers are a series of numbers or letters used to identify and differentiate products in the global marketplace.