These tags are used to denote subheadings in a document and provide a visual hierarchy to the content, making it easier for readers to understand the structure of the text.
While h1, h2, and h3 are often used for major headings, h4, h5, and h6 can be useful for dividing content into smaller sections, such as subsections within a chapter or subcategories within a topic.
In terms of SEO, properly using these heading tags can be beneficial for a webpage. Search engines use headings to understand the structure of a page and determine the relevance of the content. Using headings properly can help search engines understand the main topics and subtopics of the content on a page, which can improve its ranking in search results.
Overall, while h4, h5, and h6 may not be used as frequently as h1, h2, and h3, they are still important HTML tags that can provide structure and organization to a document and help improve its SEO.