What is the function of the <h1> tag in HTML?

The

tag in HTML is specifically designed to define the largest heading on a webpage. It signifies the most important heading in the document's hierarchy and is typically used for the main title or theme of the content. Using

is essential for search engine optimization (SEO) as it helps search engines understand the main topic of the webpage. This hierarchical structure is critical for organizing content, making it easier for users to read and navigate through the information. By using

, web developers ensure that the content is not only visually distinct due to its size and formatting but also serves a functional purpose in content organization and accessibility.