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SEO

Structured Data

Structured Data is markup that systematically describes information on a web page using the [Schema.org](https://schema.org/) standard vocabulary, enabling search engines and AI systems to understand the content.

Structured Data is markup that systematically describes information on a web page using the Schema.org standard vocabulary, enabling search engines and AI systems to understand the content.

Why It Matters

Search engines typically infer meaning by crawling the text on a page. However, when structured data is applied, the page is interpreted at the semantic level rather than the text level, allowing search engines to understand the content's type and context far more accurately. This enables pages to appear as rich results in search results — featuring star ratings, prices, author photos, breadcrumbs, and more. Analysis shows that pages with rich results achieve an average of 30% or higher CTR compared to standard results.

As of 2026, the value of structured data extends beyond rich results. When generative AI systems such as ChatGPT and Perplexity crawl web pages, they directly parse JSON-LD markup and use it as source material for their answers. From a GEO (Generative Engine Optimization) perspective, structured data has become an essential element.

That said, Google has officially stated that structured data does not directly influence search rankings. The core benefits are improved CTR through rich results and enhanced visibility within AI systems — not direct ranking boosts.

Main Formats (JSON-LD, Microdata, RDFa)

There are three formats for implementing structured data:

  • JSON-LD (JavaScript Object Notation for Linked Data): Inserted into the HTML <head> or <body> using a <script type="application/ld+json"> tag. Because it is completely separated from the HTML structure, it is easy to maintain and is the format officially recommended by Google. For example, to apply an Article schema to a blog post:
{
  "@context": "https://schema.org",
  "@type": "Article",
  "headline": "The Complete Guide to Structured Data",
  "author": { "@type": "Person", "name": "John Doe" },
  "datePublished": "2026-03-17"
}

  • Microdata: Marked up directly via HTML tag attributes (itemscope, itemtype, itemprop). Because it is coupled with the HTML, modifications are more error-prone.

  • RDFa (Resource Description Framework in Attributes): Uses HTML attributes (vocab, typeof, property) in a similar fashion to Microdata, embedding directly into HTML.

In practice, JSON-LD is the standard due to its maintainability and implementation convenience.

Supported Rich Result Types

Key structured data types supported by Google as of 2026 include:

  • Article: Displays headline, author, and publication date for news and blog posts.
  • Product: Shows price, availability, and review ratings for products in search results.
  • BreadcrumbList: Displays the page's position within the site hierarchy.
  • Organization / LocalBusiness: Shows business information, logo, contact details, and operating hours.
  • HowTo: Presents step-by-step guides with rich visual formatting.
  • Review: Displays star ratings and review counts in search results.

Note that since H2 2025, Google has discontinued rich result support for certain structured data types (Course Info, Claim Review, Estimated Salary, Learning Video, Special Announcement, Vehicle Listing, etc.). Additionally, FAQ rich results are now restricted to government and health-related sites, so always check the latest support status before implementation.

Implementation and Validation

The process for correctly implementing and validating structured data is as follows:

  1. Select the schema type: Choose the Schema.org type that matches your page content. For a blog, Article is appropriate; for a product page, use Product.
  2. Write the JSON-LD: Check the Google Search Central documentation for required and recommended properties and include them all.
  3. Verify consistency with page content: Information described in the markup must always match what is actually displayed on the page. Including content in the markup that is not visible to users violates Google's spam policies.
  4. Use validation tools: Check for syntax errors and missing required fields with the Google Rich Results Test, and continuously monitor structured data status across your site through Google Search Console's "Enhancements" report.
  5. Keep it updated: Whenever content changes, update the structured data accordingly to ensure it always reflects the current state.

Related inblog Posts

How inblog Helps

inblog automatically embeds BlogPosting JSON-LD and Organization structured data on every post.