Which tag is defined as a section in a webpage?

The section tag is designed specifically to create a thematic grouping of content within a webpage. This tag is used to encapsulate content that has a common theme or purpose, enabling better organization of information and enhancing the semantic structure of the webpage. Utilizing the section tag also improves accessibility for assistive technologies, allowing users to navigate content more effectively. By leveraging this tag, developers can create a more readable and well-structured document, adhering to best practices in HTML5.

While other tags exist for different purposes—like the article tag, which represents a self-contained piece of content, the footer tag, meant for footer content such as copyright information, and the nav tag, which is used to define navigation links—none of these tags serve the same purpose as the section tag in delineating different thematic areas of a webpage. This focus on thematic separation makes the section tag the correct choice for defining a section in a webpage.