A header tag is an HTML heading element—H1 through H6—used to organize a webpage into a logical hierarchy. The H1 generally identifies the main subject, while H2s and lower-level headings divide the page into related sections and subsections.
Header tags are important for SEO because they help users and search engines understand the structure and topics covered on a page. Clear headings also improve readability by allowing visitors to scan content and quickly find the information they need.
Headings should describe the section naturally. They do not need to repeat the same exact keyword, and adding keywords solely for SEO can make content awkward. Instead, use headings to create a meaningful outline of the subject and address relevant questions and concepts.
Header structure is one of several on-page SEO factors and works alongside the title tag, page content, internal linking, and overall user experience.
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