Structured data is one of the few SEO levers that directly produces visible SERP changes. Add Recipe schema and you might get a recipe carousel. Add FAQPage schema and you might get expandable FAQs in the SERP. Beyond rich results, structured data is also the most efficient way to communicate exactly what your page is about to search engines and AI assistants. This guide explains how it works and which schemas matter most.
Structured data is machine-readable markup (using the Schema.org vocabulary, in JSON-LD format) that tells search engines and AI assistants exactly what your page is about. It powers rich results in Google (stars, FAQs, breadcrumbs, recipes), enables knowledge-graph entity recognition, and makes your content far easier for AI assistants to cite accurately.
Structured data is one of the few SEO levers that directly produces visible SERP changes. Add Recipe schema and you might get a recipe carousel. Add FAQPage schema and you might get expandable FAQs in the SERP. Beyond rich results, structured data is also the most efficient way to communicate exactly what your page is about to search engines and AI assistants. This guide explains how it works and which schemas matter most.
Structured data is machine-readable markup that describes the content of a page. It uses the Schema.org vocabulary — a shared, search-engine-supported set of types and properties (Article, Product, Recipe, LocalBusiness, etc.) — and is typically embedded as JSON-LD in a script tag in the page head.
JSON-LD is Google's recommended format. Microdata and RDFa are also supported but harder to maintain. Stick to JSON-LD unless you have a strong reason not to.
Some schema types unlock rich results; others communicate entity information used by AI assistants and the knowledge graph. The schemas with the most universal value:
Most structured data bugs fall into a few patterns:
AI assistants love structured data because it removes ambiguity. A page with Article schema (with author, datePublished, headline, image, publisher) is far easier to cite confidently than one without. A LocalBusiness schema with NAP, hours, and services makes accurate citation trivial.
Practical rule: every page should have at minimum a sitewide Organization schema and a page-specific schema (Article, Product, Service, etc.) that matches its content type. That covers ~90% of the AI-citation benefit.
Validate every schema implementation with Google's Rich Results Test (rich result eligibility) and Schema.org's Validator (syntax and vocabulary correctness). Monitor in Search Console under Enhancements — Google reports errors and warnings per schema type.
If you ship a schema change, re-validate in Rich Results Test before deploying, and re-check Search Console a week later for new errors.
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