Header tags (H1-H6) are HTML elements that define headings and subheadings on a web page. They help structure content and establish hierarchy. Search engines also use headers to index and determine relevancy.
Header tags are vital for on-page SEO as they make content scannable for users and optimize pages for search ranking. Proper headers inform search bots what pages are about.
To balance scannability and keyword optimization, follow recommended word counts - H1: 15 words, H2: 10 words, H3: 6 words. More words risks diluting relevance signals.
Use a single H1 tag per page to indicate the overall topic. Think of it like the title of the content. It carries the most SEO weight so optimize for a major keyword.
H2 and lower tags create subheadings to break up text into scannable sections. H2 tags start new topic segments. H3 and additional tags create subsections with more detail.
Header tags should use a hierarchical structure, nesting lower tags under higher ones in order. An H3 should have a parent H2, an H2 should have a parent H1 tag above it.
To comply with accessiblity standards, bookmark header tags and format them properly. Avoid skipping header levels and style tags to only visually look bigger.
SEO is dynamic. Regularly review and update your keyword list to adapt to new trends, technologies, and user behaviors.
Watch for too many headers, overstuffing tags with keywords, uneven nesting like H1 to H3 skips, all caps ANNOYING TEXT, templated content with repetitive poor headers.
Write conversational headers, use sentence case capitalization, highlight benefits and summarize topics well for readers and SEO.