Insights · Technik

Schema markup explained: structured data for Google and AI

Jun 23, 2026 · 5 min · Daniel Giebelhaus

Schema markup (structured data) is a standardised vocabulary you use to tell search engines and AI, in machine language, what is on your page: that this is a business, that a review, this an opening time. So the machine does not have to guess.

Why it matters

Google and AI systems read text, but structured data makes the meaning unambiguous. That brings two things: better presentation in search results (so-called rich results like FAQ expanders or review stars) and a more reliable machine understanding that also helps in AI search.

The most important types

How it is added

The most common format is JSON-LD, a small code block in the page source. Important: the markup must match the visible content, invented or hidden data violates the guidelines and can hurt you. Everything can be checked with Google's Rich Results Test.

Structured data is a building block of AEO and GEO and supports classic SEO at the same time.

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