It's not as easy as faking metadata of 5* user ratings of your own content. If it ever was, that technique is no longer useful and likely to lead to losing rank

It's not as easy as faking metadata of 5* user ratings of your own content. If it ever was, that technique is no longer useful and likely to lead to losing rank. Google uses a subset of schema.org, validates it according to its own stricter specification and extends it in other ways. It doesn't naively consume everything you provide. For example [1] > If the Recipe structured data contains a single review, the reviewer's name must be a valid person or organization. For example, "50% off ingredients" is not a valid name for a reviewer. > Warning: If your site violates one or more of these guidelines, then Google may take manual action against it. Once you have remedied the problem, you can submit your site for reconsideration. [1] https://developers.google.com/search/docs/advanced/structured-data/review-snippet#guidelines https://developers.google.com/search/docs/advanced/structure...