{"id":91211,"date":"2026-02-11T07:04:54","date_gmt":"2026-02-11T07:04:54","guid":{"rendered":"https:\/\/alienroad.com\/%e6%9c%aa%e5%88%86%e9%a1%9e\/what-are-backlinks\/"},"modified":"2026-04-05T08:17:24","modified_gmt":"2026-04-05T08:17:24","slug":"what-are-backlinks","status":"publish","type":"post","link":"https:\/\/alienroad.com\/ja\/seo-2\/what-are-backlinks\/","title":{"rendered":"\u30d0\u30c3\u30af\u30ea\u30f3\u30af\u3068\u306f\uff1fSEO\u30e9\u30f3\u30ad\u30f3\u30b0\u306e9\u3064\u306e\u91cd\u8981\u306a\u8981\u56e0\u3092\u89e3\u8aac"},"content":{"rendered":"\n<h1 class=\"wp-block-heading\">What Are Backlinks? 9 Critical SEO Ranking Factors Explained<\/h1>\n\n<p class=\"wp-block-paragraph\">If you want to understand how search engines rank websites, you must first understand <strong>what are backlinks<\/strong>. Backlinks remain one of the most influential ranking factors in modern SEO.<\/p>\n\n<p class=\"wp-block-paragraph\">A backlink is a hyperlink from one website to another. When another website links to your content, search engines interpret that link as a signal of credibility, authority, and relevance.<\/p>\n\n<p class=\"wp-block-paragraph\">This guide explains what backlinks are, how they work, why they matter for SEO, and how to build high-quality backlinks safely.<\/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 Backlinks?<\/a><\/li>\n\n\n\n<li><a href=\"\/#how-they-work\">How Backlinks Work<\/a><\/li>\n\n\n\n<li><a href=\"\/#why-important\">Why Backlinks Matter for SEO<\/a><\/li>\n\n\n\n<li><a href=\"\/#authority\">Authority and Trust Signals<\/a><\/li>\n\n\n\n<li><a href=\"\/#types\">Types of Backlinks<\/a><\/li>\n\n\n\n<li><a href=\"\/#quality\">Quality vs Quantity<\/a><\/li>\n\n\n\n<li><a href=\"\/#anchor\">Anchor Text Importance<\/a><\/li>\n\n\n\n<li><a href=\"\/#building\">How to Build Backlinks<\/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 Backlinks?<\/h2>\n\n<p class=\"wp-block-paragraph\">To clearly answer <strong>what are backlinks<\/strong>, they are incoming links from external websites that point to your domain.<\/p>\n\n<p class=\"wp-block-paragraph\">Example:<\/p>\n\n<pre class=\"wp-block-preformatted\">&lt;a href=\"https:\/\/example.com\/what-are-backlinks\"&gt;What are backlinks&lt;\/a&gt;\n<\/pre>\n\n<p class=\"wp-block-paragraph\">Search engines treat backlinks as endorsements. The more reputable the linking website, the stronger the endorsement.<\/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 backlinks\" title=\"\"><\/figure>\n\n<h2 class=\"wp-block-heading\">How Backlinks Work<\/h2>\n\n<p class=\"wp-block-paragraph\">Search engines use backlinks to evaluate the importance of a page. When a trusted website links to your content, it passes authority through that link.<\/p>\n\n<p class=\"wp-block-paragraph\">This concept is often referred to as link equity or link juice.<\/p>\n\n<ul class=\"wp-block-list\">\n<li>High-authority links pass stronger signals<\/li>\n\n\n\n<li>Relevant links carry more weight<\/li>\n\n\n\n<li>Spammy links can harm performance<\/li>\n<\/ul>\n\n<p class=\"wp-block-paragraph\">Understanding <strong>what are backlinks<\/strong> means understanding how authority flows across the web.<\/p>\n\n<h2 class=\"wp-block-heading\">Why Backlinks Matter for SEO<\/h2>\n\n<p class=\"wp-block-paragraph\">Backlinks are critical because they influence:<\/p>\n\n<ul class=\"wp-block-list\">\n<li>Search rankings<\/li>\n\n\n\n<li>Domain authority<\/li>\n\n\n\n<li>Trust signals<\/li>\n\n\n\n<li>Organic visibility<\/li>\n\n\n\n<li>Referral traffic<\/li>\n<\/ul>\n\n<p class=\"wp-block-paragraph\">Pages with strong backlink profiles typically rank higher than pages without them.<\/p>\n\n<h2 class=\"wp-block-heading\">Authority and Trust Signals<\/h2>\n\n<p class=\"wp-block-paragraph\">Not all backlinks are equal. Links from reputable websites carry significantly more value.<\/p>\n\n<p class=\"wp-block-paragraph\">For example, a backlink from a major news site is stronger than one from a new, low-quality blog.<\/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 backlink authority analysis\" title=\"\"><\/figure>\n\n<h2 class=\"wp-block-heading\">Types of Backlinks<\/h2>\n\n<ul class=\"wp-block-list\">\n<li><strong>Dofollow links:<\/strong> Pass ranking authority<\/li>\n\n\n\n<li><strong>Nofollow links:<\/strong> Do not pass direct authority<\/li>\n\n\n\n<li><strong>Editorial links:<\/strong> Earned naturally<\/li>\n\n\n\n<li><strong>Guest post links:<\/strong> Created via content collaboration<\/li>\n\n\n\n<li><strong>Directory links:<\/strong> Listed in online directories<\/li>\n<\/ul>\n\n<p class=\"wp-block-paragraph\">Editorial backlinks are generally considered the highest quality.<\/p>\n\n<h2 class=\"wp-block-heading\">Quality vs Quantity<\/h2>\n\n<p class=\"wp-block-paragraph\">In the past, quantity was emphasized. Today, quality is far more important.<\/p>\n\n<p class=\"wp-block-paragraph\">A few high-authority backlinks can outperform hundreds of low-quality links.<\/p>\n\n<p class=\"wp-block-paragraph\"><strong>Warning:<\/strong> Buying backlinks or participating in link schemes violates search engine guidelines and may cause penalties.<\/p>\n\n<h2 class=\"wp-block-heading\">Anchor Text Importance<\/h2>\n\n<p class=\"wp-block-paragraph\">Anchor text is the clickable text of a backlink. It influences how search engines interpret relevance.<\/p>\n\n<ul class=\"wp-block-list\">\n<li>Use natural phrases<\/li>\n\n\n\n<li>Avoid overusing exact-match keywords<\/li>\n\n\n\n<li>Maintain contextual alignment<\/li>\n<\/ul>\n\n<p class=\"wp-block-paragraph\">Balanced anchor text helps avoid algorithmic risks.<\/p>\n\n<h2 class=\"wp-block-heading\">How to Build Backlinks<\/h2>\n\n<p class=\"wp-block-paragraph\">Safe and effective backlink strategies include:<\/p>\n\n<ul class=\"wp-block-list\">\n<li>Publishing high-quality content<\/li>\n\n\n\n<li>Digital PR outreach<\/li>\n\n\n\n<li>Guest blogging<\/li>\n\n\n\n<li>Broken link building<\/li>\n\n\n\n<li>Creating shareable resources<\/li>\n<\/ul>\n\n<p class=\"wp-block-paragraph\">Official guidance: <a href=\"https:\/\/developers.google.com\/search\/docs\/essentials\/spam-policies#link-spam\" target=\"_blank\" rel=\"noopener\">Google Link Spam Policies<\/a><\/p>\n\n<h2 class=\"wp-block-heading\">Final SEO Checklist<\/h2>\n\n<ul class=\"wp-block-list\">\n<li>Focus on quality over quantity<\/li>\n\n\n\n<li>Prioritize relevant backlinks<\/li>\n\n\n\n<li>Avoid manipulative link schemes<\/li>\n\n\n\n<li>Monitor backlink profile regularly<\/li>\n\n\n\n<li>Maintain natural anchor text diversity<\/li>\n<\/ul>\n\n<p class=\"wp-block-paragraph\">Once you fully understand <strong>what are backlinks<\/strong>, you can build stronger authority, improve search visibility, and create sustainable SEO growth.<\/p>\n\n<p class=\"wp-block-paragraph\">Internal resources: <a href=\"https:\/\/alienroad.com\/seo-2\/why-are-internal-links-important-for-seo\/\">Why are internal links important for SEO<\/a>, <a href=\"https:\/\/alienroad.com\/seo-2\/what-is-internal-linking\/\">What is internal linking<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>What Are Backlinks? 9 Critical SEO Ranking Factors Explained If you want to understand how search engines rank [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":60738,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1221],"tags":[1363],"class_list":["post-91211","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\/91211","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=91211"}],"version-history":[{"count":2,"href":"https:\/\/alienroad.com\/ja\/wp-json\/wp\/v2\/posts\/91211\/revisions"}],"predecessor-version":[{"id":91241,"href":"https:\/\/alienroad.com\/ja\/wp-json\/wp\/v2\/posts\/91211\/revisions\/91241"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/alienroad.com\/ja\/wp-json\/wp\/v2\/media\/60738"}],"wp:attachment":[{"href":"https:\/\/alienroad.com\/ja\/wp-json\/wp\/v2\/media?parent=91211"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/alienroad.com\/ja\/wp-json\/wp\/v2\/categories?post=91211"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/alienroad.com\/ja\/wp-json\/wp\/v2\/tags?post=91211"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}