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GS1 US Data Hub helps to manage data and easily identify, create and verify them through one convenient tool.
Pros: GS1 only has a few tabs in on their website to use, this makes use simple and to the point.
Cons: Since there are not many tabs, there isn't much room to learn more or customize anything.
Overall: Overall, if you need UPCs GS1 does make the experience simple, although pricey.