Structured data is code you add to a page, usually Schema.org markup, that spells out what the content means so search engines and AI systems can read it without guessing.
Structured data is code you add to a page that spells out what the content means, so search engines and AI systems can read it without guessing. Usually it follows the Schema.org vocabulary, a shared set of types like Product, Article, LocalBusiness, Review and Event that describe what a page is about in a way machines understand.
A person reading your page can tell that '$49' is a price, 'Tuesday' is an opening day and '4.8 stars' is a rating. A crawler cannot always be sure. Structured data labels those facts explicitly, most often as a block of JSON-LD in the page's code, so the machine reads them as data rather than inferring them from the layout. Google uses it to understand pages and to build rich results, the star ratings, breadcrumbs, prices and other extras you see in search listings.
For a business owner the payoff is twofold. Rich results make your listing stand out and can lift click-through, and clean markup helps both Google and AI answer engines describe your business accurately. This is a core part of both technical SEO and AEO: when a system such as an AI Overview is deciding what your page says, unambiguous data is far easier to trust and lift than prose it has to interpret.
One honest caveat: structured data helps Google understand a page, but marking something up does not guarantee a rich result. Google decides when to show those, and it has to match what is actually visible on the page. Marking up a rating you do not display, or that is not genuine, is against the rules and can earn a penalty. Used properly it is one of the highest-value bits of technical work; used to game the system it backfires.
Key points
- Structured data is code, usually Schema.org markup, that tells machines what your content means.
- It is most often added as JSON-LD and describes facts like price, rating, author or opening hours.
- It powers rich results, the stars, breadcrumbs and prices that make a listing stand out.
- It helps AI systems describe your business accurately rather than guessing.
- Markup must match what is visible on the page; faking it breaks Google's rules.
- Marking up does not guarantee a rich result; Google decides when to show one.
Frequently asked questions
Common questions about structured data.
Schema.org is the shared vocabulary, the agreed list of types and properties like Product, Article and LocalBusiness. Structured data is the broader idea of marking content up so machines can read it, and Schema.org is the vocabulary almost everyone uses to do it, usually written in a format called JSON-LD. In everyday use people say 'schema markup' and 'structured data' to mean the same thing.
Not directly, and I would be wary of anyone who promises it will. It helps Google understand your page and can earn rich results that lift click-through, which brings more visits, but it is not a ranking boost in itself. Its bigger value now is that clean, accurate markup helps both Google and AI answer engines read your business correctly. I cover it as part of my SEO and AEO service.
It helps, but you do not have to hand-write it. Many platforms and plugins add common markup for you, and Google publishes a Rich Results Test you can use to check what it sees. The care is in getting it accurate and keeping it matched to what is actually on the page, which is where it is worth having someone who knows the rules rather than pasting in a generic block.
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