Google will not display a rich snippet for a review if a rating is not included in the review markup. You can mark it up as such, but it won't generate a rich snippet. And it's also against Google's guidelines to mark up reviews and ratings that were obtained on third-party sites.
How to display review counts with no ratings in Google RichSnippets
-
27-06-2023 - |
题
My requirement to display is to display the review count in Google RichSnippets for reviews that may not have associated ratings. The validator doesn't show any RichSnippet and complains with:
Error: rating could not be normalized
Error: rating is empty
I uploaded the offending html to https://gist.github.com/jmjpro/9956487.
I provide more background to the question on my blog post.
解决方案
不隶属于 StackOverflow