What is Structured Data?
Structured data is a standardised format for providing information about a page's content to search engines — using vocabularies like Schema.org to explicitly describe entities, properties, and relationships so machines can understand what a page is about.
Why It Matters
Search engines process billions of pages. Understanding what each page is actually about — not just the words on it, but the entities, relationships, and facts — is the core challenge of search. Structured data makes this explicit. Instead of Google inferring from context that a page describes a product with a certain price, structured data states it directly.
The benefits are immediate and measurable. Structured data enables rich results (star ratings, prices, FAQ accordions in search results), feeds Google's Knowledge Graph, improves content understanding for AI Overviews, and helps Google match pages to the right queries. Sites with comprehensive structured data consistently outperform those without it in rich result eligibility and click-through rates.
How It Works
Structured data operates through a simple framework:
- Vocabulary — Schema.org is the standard vocabulary, jointly maintained by Google, Bing, Yahoo, and Yandex. It defines types (Product, Person, Article) and properties (name, price, author) for describing web content.
- Format — JSON-LD is the recommended encoding format. A script block in the page's HTML contains the structured data in JSON format. Microdata and RDFa are older alternatives that embed data directly in HTML tags.
- Types and properties — Each page's structured data uses one or more Schema.org types. A product page uses Product. A business homepage uses LocalBusiness. A blog post uses Article. Each type has defined properties that describe it.
- Validation and eligibility — Google's Rich Results Test checks whether structured data is valid and eligible for enhanced search features. Eligibility depends on the type, the completeness of the data, and whether the page meets Google's content guidelines.
Common Mistakes
Adding structured data only to the homepage. Every page type benefits from structured data: product pages, service pages, blog posts, FAQ pages, location pages, author profiles. A site that only marks up the homepage misses rich result opportunities on every other page.
The other mistake is treating structured data as a ranking factor rather than a communication layer. Structured data does not directly boost rankings — it helps Google understand content and enables rich results. A page with structured data but poor content will not rank. A page with great content and structured data gets the best of both: strong rankings and enhanced SERP display.
How I Use This
Structured data is a core component of every site I work on. My SEO automation deploys Schema.org markup across entire sites — article schema, product schema, FAQ schema, breadcrumb schema, organisation schema. For AI search, my AI search optimisation uses structured data to help AI systems identify and cite content correctly, going beyond traditional rich results into the AI visibility layer.
References & Authority
This term is recognised by established knowledge bases:
Related Services
How BrightIQ uses Structured Data
This concept is central to the following services:
Related Terms
JSON-LD
JSON-LD (JavaScript Object Notation for Linked Data) is the format Google recommends for adding structured data to web pages — a script block in the page's HTML that describes entities, relationships, and properties in a machine-readable format without affecting the visible content.
Product Schema Markup
Product schema markup is structured data (typically JSON-LD) added to product pages that tells search engines the product's name, price, availability, brand, reviews, and other attributes — enabling rich results like star ratings, price ranges, and stock status directly in Google search results.
Schema Markup
Schema markup is structured data code (typically JSON-LD) added to web pages that helps search engines understand the content — identifying entities like products, businesses, articles, and FAQs so Google can display rich results with star ratings, prices, and other enhanced features.