SEO Glossary

Structured Data

Machine-readable labels (usually JSON-LD) added to a page that tell search engines exactly what it contains — an article, a product, an FAQ. It powers rich results like stars, prices, and FAQ dropdowns.

What structured data is

Structured data is a block of machine-readable labeling embedded in a page, describing what the page contains in a vocabulary search engines agreed on (schema.org). The format Google recommends is JSON-LD — a script tag invisible to visitors:

<script type="application/ld+json">
{
  "@context": "https://schema.org",
  "@type": "Article",
  "headline": "Cold Brew Coffee: The Complete Guide",
  "author": { "@type": "Person", "name": "Maria Chen" },
  "datePublished": "2026-03-02"
}
</script>

Where your visible text makes a human infer "this is an article by Maria, published in March", structured data states it outright, with no interpretation needed.

What it gets you

  • Rich results. Star ratings, prices, FAQ dropdowns, recipe cards, event details — the enhanced listings in Google are powered by specific structured-data types. Google's gallery lists which types unlock which features. Eligibility, not a guarantee: Google decides case-by-case whether to show them.
  • Disambiguation. Person, Organization, and sameAs markup tell Google who wrote and published the page — connecting your site to a real entity rather than leaving it anonymous. That's why author and publisher markup shows up in trust discussions around E-E-A-T.
  • A machine-readable page for machines that increasingly read pages. Search engines and AI systems both prefer content whose meaning doesn't need guessing.

It is not a rankings cheat code: Google has repeatedly said structured data by itself doesn't make a page rank higher. It changes how your listing looks and how confidently systems understand it.

The silent failure mode

Structured data must parse. A JSON-LD block with a syntax error — a trailing comma, an unclosed brace, a stray quote — isn't partially read; it's ignored entirely, with no visible symptom on the page. Markup also must match the visible content: labeling reviews the page doesn't show violates Google's guidelines and can draw a manual action.

Validate with Google's Rich Results Test after any template change; Search Console reports parsing errors it finds during crawling.

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