Pages have outlines
Readers skim headings to find what they need — and so do screen readers and search engines. HTML has six heading levels, <h1> to <h6>, that build a page's outline like chapters and sections in a book.
Heading levels
- Use one <h1> per page, for its main title.
- Don't skip levels going down: after h2 comes h3, not h4.
- Choose headings by meaning, not size. Size is CSS's job.
- <p> is a paragraph. <br> forces a line break (no closing tag), but most of the time a new paragraph is better.