Link Building

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What Is Link Building?

Link building is the practice of earning hyperlinks from other websites to your own. Backlinks are one of Google's strongest ranking signals — they function as votes of confidence from other sites, indicating that your content is credible and worth referencing. In the AI era, the quality and topical relevance of links matters more than ever.

Quality Over Quantity

The era of bulk link acquisition is over. A single link from a highly authoritative, topically relevant site is worth more than hundreds of links from low-quality directories or unrelated blogs. Google's Penguin algorithm and subsequent AI-based spam detection have made low-quality link building actively harmful.

The Link Building Hierarchy

• Editorial links — Earned naturally when quality content is cited; highest value
• Digital PR — Proactively pitching data or stories to journalists; high value
• Broken link building — Finding broken links on relevant sites and offering replacement content
• Resource page link building — Getting listed on curated resource pages in your topic area
• Guest posting — Writing for other sites with a link back; effective on genuine authority sites
• Audit your existing backlink profile — Use Ahrefs or Semrush; identify toxic links and disavow if necessary
• Benchmark competitors — Analyze who links to your top competitors but not to you
• Create linkable assets — Publish original research, data studies, or free tools people naturally want to reference
• Run a digital PR campaign — Pitch a data-driven insight to relevant journalists and publications
• Find broken link opportunities — Use Ahrefs to find broken links on relevant resource pages; pitch replacement content
• Target resource pages — Find curated resource pages in your niche and submit your best content
• Build relationships before asking — Engage genuinely with writers and editors before outreach
• Monitor unlinked brand mentions — Use Ahrefs Alerts to find mentions without links and request additions
• Buying links — Paid links violate Google guidelines and carry significant penalty risk
• Over-optimized anchor text — Using the same keyword-rich anchor text repeatedly looks manipulative
• Ignoring link relevance — A link from an unrelated site provides minimal value
• Link schemes and PBNs — Easily detected by Google's algorithms; avoid entirely
• Not disavowing toxic links — A large profile of spammy links can suppress rankings
• Ahrefs Backlink Checker — Comprehensive backlink analysis and opportunity discovery
• Semrush Backlink Analytics — Backlink audit and toxic link identification
• Moz Link Explorer — Domain Authority scoring and link profile analysis
• Hunter.io — Email finding for outreach campaigns

How many backlinks do I need to rank?

There is no universal number. Check the backlink profiles of pages currently ranking in the top 3 for your target queries — that gives you a realistic benchmark for the authority level you need to compete.

Does link building still matter with AI search?

Yes. Links remain one of Google's strongest ranking signals, and AI search systems surface pages that Google ranks highly. Backlinks are still a core component of how Google determines which pages are authoritative enough to rank and cite.

What is a good domain authority score?

Domain Authority and Domain Rating are relative metrics. What matters is your authority relative to competitors in your niche. Focus on improving your score relative to competitors, not hitting a specific number.

How Moz Built Domain Authority Through Original Research

Moz's annual "State of SEO" and "Local Search Ranking Factors" reports are among the most linked-to pieces of content in the SEO industry. Each report earns hundreds of new backlinks annually from industry blogs, news sites, and practitioners citing the data. The strategy is straightforward: conduct original research that no one else has done, publish it comprehensively with visualizable data, and promote it to every publication covering the topic. One well-researched data study earns more high-quality links than a year of guest posting. Moz has compounded this approach for over a decade, and their domain authority is a direct result of the link equity these reports generate annually.