GTIN (Global Trade Item Number) – Specifies the unique code of the packaged product or service. The name GTIN defines the entire family of identifier structures developed by GS1. These identifiers can consist of a different number of digits (8, 12, 13 or 14).
GS1 – A non-profit organization that standardizes rules and guidelines to improve operations in supply chains.
More information you can find in here.
How can you add a bar code on your Shoplo admin panel?
For example, you can add codes such as GTIN, ISBN, etc. when adding a product or editing it.
When adding a new product, enter it in the Bar Code field
If your product has variants, then each of them will have a separate code.
Go to Products> Select a product> Variant Section > Barcode .