Which HTML tag is used for the largest heading?

The tag used for the largest heading in HTML is the <h1> tag. This tag signifies the most important heading on a webpage, and it is typically used for the main title or a key section title. Browsers often render this tag in a larger and bolder font compared to other heading tags, such as <h2> and <h3>, making it visually prominent.

Using heading tags correctly is important for structure, accessibility, and SEO (Search Engine Optimization). The correct use of headings allows search engines to better understand the content of the page and can improve a site's search ranking. The <div> tag, on the other hand, is a general-purpose container that does not have semantic meaning related to headings, which is why it doesn't serve the same function as the heading tags.