Definition Review schema holds itemReviewed, reviewRating (Rating or AggregateRating), author, and reviewBody under the Review type. Star rating uses bestRating and worstRating bounds.
How it works A JSON-LD Review block is declared on the page. Use Review for a single review and AggregateRating for a summary of many. Google restricted review snippets: only non-self-serving, third-party-authored reviews can produce rich results. Self reviews do not produce rich results.
Where you see it in Scope Trends **Schema Sentinel** audits review schema coverage and self-review risk. The **Competitor Spy** report shows competitor review schema coverage.
Frequently asked questions **Add review schema to my own product?** Allowed, but Google will not render rich results. Third-party reviews are required.
**Can star value be decimal?** Yes. Values like 4.7/5 are accepted, but rounding should be consistent.