Glossary · seo
Schema.org
Definition
Schema.org is an open structured-data vocabulary co-created in 2011 by Google + Microsoft + Yahoo + Yandex. By adding JSON-LD to your page you tell search engines "this content is a product/article/event/review". Critical for rich snippets + AI search citation.
Detailed explanation
Critical for AI search in 2026: ChatGPT, Perplexity, Claude, Gemini consume schema markup. Pages with schema get 30-40% more AI citations (Princeton GEO study).
Most common types: Article (blog), Product (e-commerce), Service, Organization, Person, Event, Recipe, FAQPage, HowTo, Review, AggregateRating, BreadcrumbList, ItemList, LocalBusiness, WebSite.
JSON-LD format: most common (inside script tag), Microdata + RDFa are alternatives. Google prefers JSON-LD. Test with: Google Rich Results Test, Schema.org validator.
Rich snippet benefits: 10-30% CTR lift (stars, price, FAQ accordion in SERP). Mandatory modern SEO for e-commerce + blog + service pages.
Use cases
→AI search engine citation (ChatGPT, Perplexity)
→Google rich snippets (CTR uplift)
→Knowledge graph entry (entity recognition)
→Voice search ('Hey Google, what is X?')
→Programmatic SEO page standard
Pros
- +30-40% more AI search citations
- +Google rich snippet (CTR lift)
- +Knowledge graph + entity recognition
- +Voice-search compatible
Cons
- −Initial setup + per-page schema writing
- −Validation + maintenance needed
- −Wrong schema = penalty risk
Related terms
Related services
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