Review schema, structured data, and how to earn star ratings in Google search results.
Start with the pillar guide: Review Schema & Structured Data
A hands-on walkthrough for adding AggregateRating JSON-LD: choosing the parent type, required and recommended properties, validation, the errors that break rich results, and the self-serving trap to avoid.
Star ratings in Google come from review schema, but Google rejects self-serving markup, so most sites do it wrong. What review snippets require, the self-serving rule, and the setups that actually earn stars.
Three syntaxes can express the same schema.org data, and JSON-LD won. Why Google recommends it, what microdata and RDFa still look like in the wild, and the few cases where the older formats linger.
