The <h4> tag in HTML represents a level 4 heading. HTML provides six levels of headings, from <h1> to <h6>, with <h1> being the most important and <h6> the least. Each heading level helps to structure content and organize information hierarchically.
When you use the <h4> tag, it indicates that the text within it is a heading of a lower rank than <h1>, <h2>, and <h3> but more important than <h5> and <h6>. This helps both users and search engines understand the flow and organization of the content on a webpage.
For example, you might use an <h4> heading for subsections within a larger topic that could be represented by an <h3> heading. This practice not only makes the content more readable but also can improve SEO by clearly defining the structure of your document.