Structured data is a type of data that is organized and formatted in a specific way, making it easy to search, analyze, and process by computer systems. It is typically stored in a database, where it is represented as a series of rows and columns, with each row representing a single record and each column representing a specific attribute or field.

Structured data works by having a predefined schema or structure, which defines the types of data that can be stored and the relationships between different data elements. This structure makes it easy to search and retrieve specific information, as well as to perform complex analysis and data mining.

In the context of web development and search engine optimization (SEO), structured data is often used to provide additional information about a webpage to search engines, helping them to better understand the content and context of the page. This can improve the search engine's ability to accurately index and rank the page, leading to better visibility and higher search rankings.

Structured data can be implemented using various formats and standards, such as JSON-LD, Microdata, and RDFa, and can include information about various types of content, such as products, reviews, events, and more. By using structured data, website owners can help search engines to better understand their content and improve their search engine visibility.