Schema Markup

Vocabulary from schema.org that labels content types and properties so search engines can generate rich results.

Definition

Schema markup is a collaborative vocabulary of shared semantic tags created by Google, Bing, Yahoo, and Yandex through schema.org. It provides a standardized set of "types" (Article, Product, Person, Organization, Event, etc.) and "properties" (name, description, author, price, datePublished, etc.) that web publishers can apply to their content to help search engines understand what the content represents, not just what it says.

The most impactful schema types for SEO include: FAQPage (enables FAQ expandable in SERPs), HowTo (step-by-step rich results), Product (price, availability, and review star ratings), Recipe (cooking metadata), Article (enhanced article display), LocalBusiness (map pack and knowledge panel data), BreadcrumbList (breadcrumb trails in search results), and VideoObject (video rich results).

Schema markup is implemented using JSON-LD (JavaScript Object Notation for Linked Data) embedded as a script tag, Microdata attributes within HTML elements, or RDFa attributes. Google strongly recommends JSON-LD because it separates the structured data from the page's HTML, making it easier to maintain. Test implementations using Google's Rich Results Test and Schema Markup Validator. Incorrect or misleading schema (e.g., fake reviews or inaccurate product data) violates Google's quality guidelines and can result in manual actions.

Frequently Asked Questions

Which schema type should I implement first?

Prioritize schemas that enable rich results most directly for your content type. For blogs and editorial content: Article + BreadcrumbList. For e-commerce: Product + BreadcrumbList. For service businesses: LocalBusiness + FAQPage. For any page with FAQs: FAQPage. All sites benefit from Organization schema on the homepage.

Can using wrong schema markup hurt my site?

Yes. Google's policies prohibit markup that misrepresents page content. Specific violations include: marking up content not visible to users, using Product schema with fake reviews, or using Article schema on non-article pages. Violations can result in removal of rich result eligibility or manual penalties.