<header> and <footer> are the bookends of content. They can appear at the page level — wrapping the site-wide branding and copyright — or at the section/article level, giving each chunk of content its own introductory and closing metadata. Understanding this dual scope is the key to using them correctly.
1-A 2-A 3-A 4-A | 5 header 6 copyright 7 = <header><h1>Site</h1><nav>...links...</nav></header> 8 = <footer><p>© 2026 BitWithBite</p></footer> 9 = head = invisible metadata; header = visible top section | 10 = Author, date, tags, share links