Google search console error 
Author: X5 Croatia
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I keep getting these errors and warnings from Google, from 4 of my websites...
Main warnings
Warnings are suggestions for improvement. Some alerts may improve your appearance in Search results, and some may become errors over time. The following warnings have been found on your site:
Missing 'brand' field
Missing "review" field
Missing field "priceValidUntil"
No global identifier specified (e.g. GTIN, MPN, ISBN)
Missing "aggregateRating" field
We recommend that you correct these issues whenever possible to provide the best Google search experience and coverage.
Posted on the
Hello. What errors do you see? Please send a screenshot of the error message.
There may be warnings. But warnings, at the moment, do not prevent the display of extended data in the search.
Author
I wright the warnings...
Hello Croatia
As mentioned by Aleksej, all of these are additional pieces of information you could implement in your Ecommerce to provide more information to Google about your products. Not all of these are implemented but you won't suffer any kind of penalization for this on your website
However, you can also add some of them by enabling users' comments and ratings in your Product Sheets. Please check this on Step 3 and enable comments and ratings for your products to add some of these details to the website
I remain available here
Thank you
Stefano
Author
All right, let's try to investigate a little bit more. Thank you, let's just try to make this app TOP together, because you're on the right track but it's slow going. Thank you.