SEO Glossary

Backlinks

Hyperlinks from other websites that serve as votes of confidence and authority in search engine algorithms.

Updated July 9, 2025
SEO

Definition

Backlinks, also known as inbound links or external links, are hyperlinks from one website to another that serve as votes of confidence and authority in search engine algorithms. Quality backlinks remain one of the most important ranking factors in traditional SEO, indicating to search engines that other websites consider your content valuable, trustworthy, and worth referencing. The value of a backlink depends on factors including the linking site's authority and relevance, the context surrounding the link, the anchor text used, the link's placement on the page, and whether it's a followed or no-followed link. In the era of AI-powered search and GEO, backlinks take on additional significance because they help establish the credibility and authority signals that AI systems consider when deciding which sources to cite or reference. High-quality backlinks from authoritative sources in your industry can significantly improve your chances of being cited by AI models like ChatGPT, Claude, and Perplexity. Building effective backlinks requires creating valuable, linkable content such as original research, comprehensive guides, industry reports, or useful tools; developing relationships with other industry websites and influencers; guest posting on relevant, authoritative sites; and earning mentions through thought leadership and expertise demonstration. Modern backlink strategies must focus on quality over quantity, relevance over volume, and natural link building patterns that demonstrate genuine authority and value.

Examples of Backlinks

  • 1

    A technology blog earning backlinks from major tech publications by publishing original research on industry trends and innovations

  • 2

    A local business getting backlinks from local chambers of commerce, industry associations, and community organizations

  • 3

    A SaaS company building backlinks through comprehensive resource libraries, tools, and templates that other websites reference and link to

  • 4

    An e-commerce brand earning backlinks by creating detailed buying guides and product comparisons that become go-to resources in their niche

Frequently Asked Questions about Backlinks

Terms related to Backlinks

Domain Authority

SEO

Domain Authority (DA) is a search engine ranking score developed by Moz that predicts how well a website will rank on search engine result pages (SERPs). Scored on a scale from 1 to 100, with higher scores indicating greater ability to rank, Domain Authority is calculated using multiple factors including linking root domains, number of total links, MozRank, MozTrust, and other proprietary metrics. While not an official Google ranking factor, Domain Authority correlates strongly with search performance and is widely used by SEO professionals as a comparative metric for website authority. In the context of AI-powered search and GEO, domain authority becomes even more significant because AI systems often consider source credibility when deciding which content to cite, reference, or use in generated responses. Websites with higher domain authority are more likely to be viewed as trustworthy sources by AI models, increasing their chances of being cited in AI-generated content. Building domain authority requires comprehensive SEO strategies including high-quality content creation, earning authoritative backlinks, technical SEO optimization, user experience improvements, and consistent publishing of valuable, expert-level content. Domain Authority should be considered alongside other authority metrics like Ahrefs' Domain Rating, topical authority within specific niches, and E-A-T signals to get a complete picture of a website's overall authority and credibility in both traditional search and AI-powered systems.

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