The validation tool is just a tool to help you see that the structured data has been inserted correctly into your shop.
The validation tool is 100% optional.
You can skip this step as you are not required to validate your products.
This is probably mostly for the advanced users who would like to verify that everything is correct. Some people really like to get into the specific details and really dig under the hood. If you aren’t interested in it, that’s not a problem since it’s an optional step.
If you’re interested in validating your products, check out our helpful guide, “How Can I View My Structured Data?”