{"id":82517,"date":"2026-01-02T19:38:44","date_gmt":"2026-01-02T19:38:44","guid":{"rendered":"https:\/\/alienroad.com\/%e6%9c%aa%e5%88%86%e9%a1%9e\/what-is-backlink-2\/"},"modified":"2026-04-04T22:54:04","modified_gmt":"2026-04-04T22:54:04","slug":"what-is-backlink-2","status":"publish","type":"post","link":"https:\/\/alienroad.com\/ja\/seo-2\/what-is-backlink-2\/","title":{"rendered":"\u30d0\u30c3\u30af\u30ea\u30f3\u30af\u3068\u306f\uff1f SEO\u306e\u305f\u3081\u306e9\u3064\u306e\u5f37\u529b\u306a\u5229\u70b9"},"content":{"rendered":"\n<h1 class=\"wp-block-heading\">What Is a Backlink?<\/h1>\n\n<p>A backlink is a link from one website to another. In SEO, backlinks are one of the most important ranking factors because they signal trust, authority, and relevance to search engines.<\/p>\n\n<p>When a website earns backlinks from other reputable sites, search engines interpret this as a sign of credibility.<\/p>\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/images.unsplash.com\/photo-1553877522-43269d4ea984?auto=format&amp;fit=crop&amp;w=1200&amp;q=80\" alt=\"Backlink concept and SEO authority illustration\" title=\"\"><\/figure>\n\n<h2 class=\"wp-block-heading\">Table of Contents<\/h2>\n\n<ul class=\"wp-block-list\">\n<li><a href=\"\/#what-is-backlink\">What is a backlink?<\/a><\/li>\n\n\n\n<li><a href=\"\/#why-backlinks-matter\">Why backlinks matter for SEO<\/a><\/li>\n\n\n\n<li><a href=\"\/#how-backlinks-work\">How backlinks work<\/a><\/li>\n\n\n\n<li><a href=\"\/#types-of-backlinks\">Types of backlinks<\/a><\/li>\n\n\n\n<li><a href=\"\/#quality-vs-quantity\">Quality vs quantity<\/a><\/li>\n\n\n\n<li><a href=\"\/#anchor-text\">Anchor text and relevance<\/a><\/li>\n\n\n\n<li><a href=\"\/#link-building\">How to earn backlinks<\/a><\/li>\n\n\n\n<li><a href=\"\/#toxic-backlinks\">Toxic backlinks<\/a><\/li>\n\n\n\n<li><a href=\"\/#final-thoughts\">Final thoughts<\/a><\/li>\n<\/ul>\n\n<h2 class=\"wp-block-heading\" id=\"what-is-backlink\">What Is a Backlink?<\/h2>\n\n<p>A backlink (also called an inbound link) is created when one website links to another. Backlinks help search engines discover new pages and determine how valuable a page is.<\/p>\n\n<p>Pages with strong backlink profiles often rank higher because they appear more authoritative.<\/p>\n\n<h2 class=\"wp-block-heading\" id=\"why-backlinks-matter\">Why Backlinks Matter for SEO<\/h2>\n\n<p>Backlinks are a core part of how search engines evaluate websites. They act as \u201cvotes of confidence\u201d from other sites.<\/p>\n\n<p>Websites with high-quality backlinks usually achieve better rankings, faster indexing, and stronger domain authority.<\/p>\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/images.unsplash.com\/photo-1526378722484-bd91ca387e72?auto=format&amp;fit=crop&amp;w=1200&amp;q=80\" alt=\"Why backlinks matter for SEO rankings\" title=\"\"><\/figure>\n\n<h2 class=\"wp-block-heading\" id=\"how-backlinks-work\">How Backlinks Work<\/h2>\n\n<p>Search engines crawl links to discover content and pass ranking signals. When a trusted site links to your page, part of its authority is transferred.<\/p>\n\n<p>This process helps search engines understand which pages deserve higher visibility.<\/p>\n\n<h2 class=\"wp-block-heading\" id=\"types-of-backlinks\">Types of Backlinks<\/h2>\n\n<ul class=\"wp-block-list\">\n<li><strong>Dofollow links:<\/strong> Pass SEO authority<\/li>\n\n\n\n<li><strong>Nofollow links:<\/strong> Do not pass ranking signals<\/li>\n\n\n\n<li><strong>Editorial links:<\/strong> Earned naturally through content<\/li>\n\n\n\n<li><strong>Guest post links:<\/strong> Earned through collaborations<\/li>\n<\/ul>\n\n<h2 class=\"wp-block-heading\" id=\"quality-vs-quantity\">Backlink Quality vs Quantity<\/h2>\n\n<p>Not all backlinks are equal. A few high-quality backlinks from authoritative sites are more valuable than many low-quality links.<\/p>\n\n<p>Search engines evaluate relevance, authority, and trust when assessing backlink quality.<\/p>\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/images.unsplash.com\/photo-1498050108023-c5249f4df085?auto=format&amp;fit=crop&amp;w=1200&amp;q=80\" alt=\"High quality backlinks versus low quality links\" title=\"\"><\/figure>\n\n<h2 class=\"wp-block-heading\" id=\"anchor-text\">Anchor Text and Relevance<\/h2>\n\n<p>Anchor text is the clickable text of a link. Relevant and natural anchor text helps search engines understand what the linked page is about.<\/p>\n\n<p>Over-optimized anchor text can appear manipulative and should be avoided.<\/p>\n\n<h2 class=\"wp-block-heading\" id=\"link-building\">How to Earn Backlinks<\/h2>\n\n<ul class=\"wp-block-list\">\n<li>Create valuable, shareable content<\/li>\n\n\n\n<li>Publish data-driven resources<\/li>\n\n\n\n<li>Build relationships with industry sites<\/li>\n\n\n\n<li>Earn mentions through digital PR<\/li>\n<\/ul>\n\n<h2 class=\"wp-block-heading\" id=\"toxic-backlinks\">Toxic Backlinks<\/h2>\n\n<p>Toxic backlinks come from spammy or irrelevant websites. These links can harm SEO performance if ignored.<\/p>\n\n<p>Regular backlink audits help identify and manage harmful links.<\/p>\n\n<p>To understand performance measurement, you can also read our guide on <a href=\"https:\/\/alienroad.com\/seo-2\/seo-metrics\/\">SEO metrics<\/a>.<\/p>\n\n<h2 class=\"wp-block-heading\" id=\"final-thoughts\">Final Thoughts<\/h2>\n\n<p>Backlinks remain one of the most influential SEO factors. A strong backlink profile improves authority, trust, and search visibility.<\/p>\n\n<p>Focusing on quality, relevance, and long-term value is the safest and most effective backlink strategy.<\/p>\n\n<p>For official guidance, review Google\u2019s documentation at <a href=\"https:\/\/developers.google.com\/search\/docs\/fundamentals\/seo-starter-guide\" target=\"_blank\" rel=\"noreferrer noopener\">Google Search Central<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>What Is a Backlink? A backlink is a link from one website to another. In SEO, backlinks are one of the most im [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":61697,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1221],"tags":[1363],"class_list":["post-82517","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\/82517","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=82517"}],"version-history":[{"count":2,"href":"https:\/\/alienroad.com\/ja\/wp-json\/wp\/v2\/posts\/82517\/revisions"}],"predecessor-version":[{"id":82535,"href":"https:\/\/alienroad.com\/ja\/wp-json\/wp\/v2\/posts\/82517\/revisions\/82535"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/alienroad.com\/ja\/wp-json\/wp\/v2\/media\/61697"}],"wp:attachment":[{"href":"https:\/\/alienroad.com\/ja\/wp-json\/wp\/v2\/media?parent=82517"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/alienroad.com\/ja\/wp-json\/wp\/v2\/categories?post=82517"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/alienroad.com\/ja\/wp-json\/wp\/v2\/tags?post=82517"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}