What is Schema Markup?

Schema markup is the practical application of structured data using schema.org, the vocabulary jointly supported by Google, Bing, Yahoo, and Yandex. It defines a large library of types — from Article and Product to Recipe, Event, LocalBusiness, Person, and hundreds more — each with a set of properties that describe the entity in a way search engines can reliably interpret.

Implementing schema markup means choosing the type that best matches your content and filling in its relevant properties. A local business page would use LocalBusiness with an address, opening hours, phone number, and geo coordinates; a how-to article might use HowTo with ordered steps. The closer the type and properties match the real content, the more useful the markup is to search engines and users.

The most common way to add schema markup today is JSON-LD embedded in the page, though it can also be applied inline with Microdata attributes. Templates and CMS plugins can generate it automatically at scale, which is ideal for sites with many similar pages — every product or article gets consistent, correct markup without manual effort per page.

Because schema markup drives features that appear in search results, accuracy and validity are paramount. Markup that does not correspond to visible content, or that is technically broken, will be ignored and can, in cases of deliberate abuse, incur penalties. Validating markup with a schema testing tool and keeping it in sync with page content are essential maintenance habits.