#What structured data is
Structured data is markup, almost always JSON-LD today, embedded in a page's HTML, that names entities (a business, a vehicle, a person, an event) and states their properties and relationships in a standardized vocabulary (schema.org) that search engines and AI systems are built to parse. A page's visible text says "open until 8pm on weeknights"; the matching structured data states the same fact as a machine-readable `openingHoursSpecification` object with no ambiguity about which days or which hours.
The point is not decoration. Markup removes the guesswork a system would otherwise have to do to extract a fact from prose, and it is the mechanism that lets a rich result (a star rating snippet, an FAQ accordion, a breadcrumb trail) render in search results at all, when the underlying facts support it.
TABLE
Schema types most relevant to a dealership site
What each type is for, and the caution that applies to it.
| Schema type | What it's for | Caution |
|---|---|---|
| Organization / AutoDealer | Naming the business, its brands and departments | Must match the business's real, current details everywhere |
| LocalBusiness / address & hours | Location and opening hours | A stale hour or address is worse than none |
| FAQPage | Marking up visible question-and-answer content | Only for questions visible on the page, not invented ones |
| BreadcrumbList | Declaring a page's place in the site hierarchy | Must match the real, visible navigation path |
| Vehicle / Product | Inventory listings | Price, availability and specs must match what's current |
| AggregateRating / Review | Star ratings and reviews | Only where a real, verifiable rating or review exists |
Compiled 2026-09-13 from schema.org's published vocabulary and Google's structured-data guidelines.
#Where it goes wrong: markup that outruns the page
The single most common structured-data mistake on any site, dealer sites included, is markup asserting something the visible page does not support: a star rating with no real reviews behind it, a review schema quoting a testimonial that does not appear on the page, a price the page itself does not state. Search engines call this structured-data spam, and the consequence is not a warning; it is markup being ignored, sometimes site-wide, because the system can no longer trust that this site's markup describes reality.
The fix is simple in principle and easy to skip in practice: markup should describe only what a human visitor can independently verify by reading the same page. If a rating does not appear on the page, no rating schema belongs on it either.
#Why it matters more now
A human reader infers a lot from context: font size, position on the page, surrounding words. An AI system extracting facts to answer a question, or to decide whether to cite a page as a source, leans far more heavily on markup that states the fact plainly, because inference from unstructured prose is exactly the kind of ambiguity that produces a wrong answer or an unwarranted citation. Accurate, comprehensive structured data has become one of the more consequential, low-cost investments a dealer site can make as more discovery moves through AI-mediated systems. See car dealer AI SEO for how this fits into the broader AI-visibility foundation.