Also called: Schema markup
People read “Open Tue–Sun, 8–4”. Machines read openingHoursSpecification. Structured data says the same thing twice: once for people, once in a fixed vocabulary (Schema.org) that search engines and AI tools understand without guessing.
It can make you eligible for rich results, but Google never guarantees them.
Sources
- Introduction to structured data markup in Google Search(opens in a new tab) · Google Search Central