How to setup, Product is missing a global identifier (e.g. isbn, mpn or gtin8)
If you are finding validation warning like the below screenshot.
If the product attribute is missing you can add that product. Follow the below steps.
1. First, go to Product -> Attributes -> click on Add option.
2. Name: Enter the Product name.
3. Value: Enter the value of the product.
Click on “Save attributes” button.
In source code schema markup will be generated like below the screenshot.
That’s it for this tutorial!
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