{"id":92525,"date":"2026-02-11T06:52:31","date_gmt":"2026-02-11T06:52:31","guid":{"rendered":"https:\/\/alienroad.com\/%e6%9c%aa%e5%88%86%e9%a1%9e\/what-are-heading-tags\/"},"modified":"2026-04-05T09:02:49","modified_gmt":"2026-04-05T09:02:49","slug":"what-are-heading-tags","status":"publish","type":"post","link":"https:\/\/alienroad.com\/ja\/seo-2\/what-are-heading-tags\/","title":{"rendered":"\u30d8\u30c3\u30c7\u30a3\u30f3\u30b0\u30bf\u30b0\u3068\u306f\u4f55\u3067\u3059\u304b\uff1f 9\u3064\u306e\u91cd\u8981\u306aSEO\u69cb\u9020\u30eb\u30fc\u30eb"},"content":{"rendered":"\n<h1 class=\"wp-block-heading\">What Are Heading Tags? 9 Critical SEO Structure Rules<\/h1>\n\n<p class=\"wp-block-paragraph\">One of the most fundamental on-page SEO elements is heading tags. Many beginners ask <strong>what are heading tags<\/strong> because they see H1, H2, and H3 used in website content but do not fully understand their purpose.<\/p>\n\n<p class=\"wp-block-paragraph\">Heading tags are HTML elements that structure content into hierarchical sections. They improve readability, help search engines understand content organization, and reinforce keyword relevance.<\/p>\n\n<p class=\"wp-block-paragraph\">This guide explains what heading tags are, how they work, their SEO importance, and best practices for optimization.<\/p>\n\n<h2 class=\"wp-block-heading\">Table of Contents<\/h2>\n\n<ol class=\"wp-block-list\">\n<li><a href=\"\/#definition\">What Are Heading Tags?<\/a><\/li>\n\n\n\n<li><a href=\"\/#types\">Types of Heading Tags (H1\u2013H6)<\/a><\/li>\n\n\n\n<li><a href=\"\/#seo-importance\">Why Heading Tags Matter for SEO<\/a><\/li>\n\n\n\n<li><a href=\"\/#structure\">Proper Heading Structure<\/a><\/li>\n\n\n\n<li><a href=\"\/#h1-rule\">How Many H1 Tags Should You Use?<\/a><\/li>\n\n\n\n<li><a href=\"\/#keywords\">Using Keywords in Headings<\/a><\/li>\n\n\n\n<li><a href=\"\/#common-mistakes\">Common Heading Tag Mistakes<\/a><\/li>\n\n\n\n<li><a href=\"\/#accessibility\">Accessibility Benefits<\/a><\/li>\n\n\n\n<li><a href=\"\/#final-checklist\">Final SEO Checklist<\/a><\/li>\n<\/ol>\n\n<h2 class=\"wp-block-heading\">What Are Heading Tags?<\/h2>\n\n<p class=\"wp-block-paragraph\">Heading tags are HTML elements ranging from H1 to H6 that define headings and subheadings on a webpage. When people ask <strong>what are heading tags<\/strong>, they are referring to this HTML structure:<\/p>\n\n<pre class=\"wp-block-preformatted\">&lt;h1&gt;Main Title&lt;\/h1&gt;\n&lt;h2&gt;Subheading&lt;\/h2&gt;\n&lt;h3&gt;Sub-subheading&lt;\/h3&gt;\n<\/pre>\n\n<p class=\"wp-block-paragraph\">H1 represents the main topic. H2 and H3 break content into logical sections.<\/p>\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/images.unsplash.com\/photo-1551288049-bebda4e38f71?auto=format&amp;fit=crop&amp;w=1600&amp;q=80\" alt=\"what are heading tags\" title=\"\"><\/figure>\n\n<h2 class=\"wp-block-heading\">Types of Heading Tags (H1\u2013H6)<\/h2>\n\n<p class=\"wp-block-paragraph\">Heading tags follow a hierarchical structure:<\/p>\n\n<ul class=\"wp-block-list\">\n<li><strong>H1:<\/strong> Main page title<\/li>\n\n\n\n<li><strong>H2:<\/strong> Major sections<\/li>\n\n\n\n<li><strong>H3:<\/strong> Subsections<\/li>\n\n\n\n<li><strong>H4\u2013H6:<\/strong> Deeper sub-levels<\/li>\n<\/ul>\n\n<p class=\"wp-block-paragraph\">Search engines use this hierarchy to understand content relationships and topic depth.<\/p>\n\n<h2 class=\"wp-block-heading\">Why Heading Tags Matter for SEO<\/h2>\n\n<p class=\"wp-block-paragraph\">Heading tags help search engines identify important topics on a page.<\/p>\n\n<p class=\"wp-block-paragraph\">When optimized correctly, they:<\/p>\n\n<ul class=\"wp-block-list\">\n<li>Improve content structure<\/li>\n\n\n\n<li>Reinforce keyword signals<\/li>\n\n\n\n<li>Enhance readability<\/li>\n\n\n\n<li>Support featured snippet potential<\/li>\n<\/ul>\n\n<p class=\"wp-block-paragraph\">Understanding <strong>what are heading tags<\/strong> is essential for effective on-page SEO.<\/p>\n\n<h2 class=\"wp-block-heading\">Proper Heading Structure<\/h2>\n\n<p class=\"wp-block-paragraph\">A page should follow a logical hierarchy:<\/p>\n\n<ul class=\"wp-block-list\">\n<li>One H1 per page<\/li>\n\n\n\n<li>Multiple H2 tags allowed<\/li>\n\n\n\n<li>H3 nested under relevant H2<\/li>\n<\/ul>\n\n<p class=\"wp-block-paragraph\">Avoid skipping levels (e.g., jumping from H1 to H4).<\/p>\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/images.pexels.com\/photos\/3861969\/pexels-photo-3861969.jpeg?auto=compress&amp;cs=tinysrgb&amp;w=1600\" alt=\"seo heading tag structure example\" title=\"\"><\/figure>\n\n<h2 class=\"wp-block-heading\">How Many H1 Tags Should You Use?<\/h2>\n\n<p class=\"wp-block-paragraph\">Traditionally, SEO best practice recommended one H1 tag per page.<\/p>\n\n<p class=\"wp-block-paragraph\">Modern HTML5 technically allows multiple H1 tags, but using a single clear H1 remains the safest SEO approach.<\/p>\n\n<h2 class=\"wp-block-heading\">Using Keywords in Headings<\/h2>\n\n<p class=\"wp-block-paragraph\">Including primary and secondary keywords in headings reinforces topical relevance.<\/p>\n\n<p class=\"wp-block-paragraph\">However, avoid keyword stuffing. Headings must remain natural and readable.<\/p>\n\n<p class=\"wp-block-paragraph\">When answering <strong>what are heading tags<\/strong>, it is important to emphasize that headings guide both users and search engines.<\/p>\n\n<h2 class=\"wp-block-heading\">Common Heading Tag Mistakes<\/h2>\n\n<ul class=\"wp-block-list\">\n<li>Using headings for styling only<\/li>\n\n\n\n<li>Skipping hierarchy levels<\/li>\n\n\n\n<li>Duplicating H1 tags across pages<\/li>\n\n\n\n<li>Keyword stuffing in headings<\/li>\n\n\n\n<li>Leaving pages without structured headings<\/li>\n<\/ul>\n\n<p class=\"wp-block-paragraph\"><strong>Warning:<\/strong> Poor heading structure can confuse search engines and reduce readability.<\/p>\n\n<h2 class=\"wp-block-heading\">Accessibility Benefits<\/h2>\n\n<p class=\"wp-block-paragraph\">Heading tags improve accessibility for screen readers. Assistive technologies rely on heading structure to navigate content efficiently.<\/p>\n\n<p class=\"wp-block-paragraph\">Proper hierarchy enhances usability for all users.<\/p>\n\n<h2 class=\"wp-block-heading\">Final SEO Checklist<\/h2>\n\n<ul class=\"wp-block-list\">\n<li>One clear H1 tag<\/li>\n\n\n\n<li>Logical H2 and H3 hierarchy<\/li>\n\n\n\n<li>Primary keyword in H1<\/li>\n\n\n\n<li>Readable and structured content<\/li>\n\n\n\n<li>No skipped heading levels<\/li>\n<\/ul>\n\n<p class=\"wp-block-paragraph\">Once you fully understand <strong>what are heading tags<\/strong>, you can structure content more effectively, improve crawlability, and strengthen on-page SEO performance.<\/p>\n\n<p class=\"wp-block-paragraph\">Official guidance: <a href=\"https:\/\/developers.google.com\/search\/docs\/fundamentals\/seo-starter-guide\" target=\"_blank\" rel=\"noopener\">Google SEO Starter Guide<\/a><\/p>\n\n<p class=\"wp-block-paragraph\">Internal resources: <a href=\"\/how-to-write-seo-friendly-content\">How to write SEO-friendly content<\/a>, <a href=\"https:\/\/alienroad.com\/seo-2\/what-is-url-structure-in-seo\/\">What is URL structure in SEO<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>What Are Heading Tags? 9 Critical SEO Structure Rules One of the most fundamental on-page SEO elements is head [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":60750,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1221],"tags":[1363],"class_list":["post-92525","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-seo-2","tag-1363"],"acf":[],"_links":{"self":[{"href":"https:\/\/alienroad.com\/ja\/wp-json\/wp\/v2\/posts\/92525","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/alienroad.com\/ja\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/alienroad.com\/ja\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/alienroad.com\/ja\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/alienroad.com\/ja\/wp-json\/wp\/v2\/comments?post=92525"}],"version-history":[{"count":2,"href":"https:\/\/alienroad.com\/ja\/wp-json\/wp\/v2\/posts\/92525\/revisions"}],"predecessor-version":[{"id":92560,"href":"https:\/\/alienroad.com\/ja\/wp-json\/wp\/v2\/posts\/92525\/revisions\/92560"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/alienroad.com\/ja\/wp-json\/wp\/v2\/media\/60750"}],"wp:attachment":[{"href":"https:\/\/alienroad.com\/ja\/wp-json\/wp\/v2\/media?parent=92525"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/alienroad.com\/ja\/wp-json\/wp\/v2\/categories?post=92525"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/alienroad.com\/ja\/wp-json\/wp\/v2\/tags?post=92525"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}