True, structured data is indeed a markup language.

• True
• False

The correct answer is: True

Explanation: Structured data serves as a standardized format that offers detailed information about a web page and categorizes its content. According to Google, it aids in classifying the content on a page. Markup languages, like structured data, are types of computer code designed to be easily written, read, and comprehended by humans. A well-known example of a markup language that many marketers might recognize is HTML. Structured data operates on similar principles, allowing for the organization and presentation of information in a structured manner.

Source: HubSpot Lesson: Optimizing Your Website for Rich Results