An <h1> header tag informs search engine crawlers of the core topic of a web page. Resolving missing <h1> tags involves updating template layouts to render exactly one primary <h1>.

HTML Heading Hierarchy Rule

layout.htmlhtml
<!-- Correct single H1 per page structure -->
<header>
    <h1>Fixing Missing H1 Heading Tags in HTML</h1>
</header>
<main>
    <h2>Understanding Heading Hierarchy</h2>
    <p>Search engine crawlers rely on H1 tags for document topic extraction...</p>
</main>