Review snippets are rich results that display star ratings, review counts, and sometimes review excerpts directly in Google search results beneath an organic listing. They are enabled by adding structured data (schema markup) to web pages that contain review or rating information. When implemented correctly and eligible, review snippets make listings visually stand out in the SERP with yellow stars, which can significantly increase click-through rates compared to standard blue-link results.

How Review Snippets Work

Review snippets are generated from structured data using Schema.org vocabulary — specifically the Review, AggregateRating, or Product types. Webmasters add JSON-LD, Microdata, or RDFa markup to pages containing review content that specifies the item being reviewed, the rating value, the rating scale, and the number of ratings. Google then reads this structured data and, if the page meets its guidelines, may display the star rating information in search results. Google has strict guidelines against self-serving review markup — reviews must be from actual users, not written by the site about itself.

Eligibility note: Google restricts review snippets to specific content types: books, courses, events, how-tos, local businesses, movies, products, recipes, and software applications. Generic "business" or "service" review markup on your own site is not eligible for review snippets.

Why It Matters for SEO

Review snippets are one of the most impactful rich result types for click-through rate optimization:

  • Star ratings in search results can increase CTR by 10–35% for eligible pages
  • Higher CTR with the same rankings leads to more organic traffic without improved positions
  • Products and recipes especially benefit from aggregate rating markup
  • Review snippet eligibility can be tested in Google's Rich Results Test tool
  • Violations of review markup guidelines can result in manual actions