What is structured data?

Structured data is any kind of data that is organized in an ordered, easily accessible format, often in table form with clearly defined relationships between the individual data elements.

This data can be processed and analyzed efficiently by machines, because it follows a specific structure that is defined by schemas or models. In the context of web development and search engine optimization (SEO), structured data refers to the markup that web developers can add to a web page to give search engines like Google more detailed information about the content of that page. This markup follows specific formats that search engines understand, such as Schema.org, RDFa, microdata and JSON-LD.

How structured data differs from unstructured data

The main difference between structured and unstructured data lies in how it is organized and how well it can be processed. Structured data is organized in a predefined format that is machine-readable, so algorithms can process and analyze it easily. Typical examples are databases and Excel spreadsheets, where every column represents a particular type of data.

Unstructured data, by contrast, is not organized in a fixed format and can be a challenge for machine processing. It includes text, images, videos and other media content that has no clearly defined structure. Processing and analyzing this data calls for advanced techniques such as natural language processing (NLP) and image recognition.

Is structured data important for SEO?

Yes, structured data plays an essential role in search engine optimization. By providing explicit clues about the content of a web page, it helps search engines understand the context and the meaning of that page better. This in turn can improve how the page is presented in the search results, for example by producing rich snippets that give users additional information about the page before they click on it. Examples of rich snippets include star ratings, recipe ingredients and product availability. Using structured data can therefore raise the click-through rate (CTR), improve the visibility of a web page and ultimately lead to higher organic traffic. Structured data is also what makes a page quotable for AI systems, which is the heart of generative engine optimization.