Backlinks & Referring Domains
TL;DR
Backlinks are links from other websites to yours — still one of Google's top 3 ranking factors. Quality matters more than quantity: one link from a news site beats 100 from spam blogs.
Explain Simply
Backlinks are like votes of confidence. When another website links to yours, it's like saying 'This site knows what it's talking about.' The more trusted the voter, the more powerful the vote.
Backlinks (inbound links) are hyperlinks from external websites pointing to your pages. They remain one of Google's most important ranking signals, functioning as 'votes of confidence' from other sites. Google evaluates backlinks on quality (authority of linking domain), relevance (topical relationship), diversity (number of unique referring domains), and anchor text.
Not all backlinks are equal. Links from high-authority, topically relevant sites carry the most weight. Editorial links (naturally earned through great content) are most valuable. Paid links, link exchanges, and PBN (Private Blog Network) links violate Google's guidelines and risk manual penalties.
Key metrics: referring domains (unique sites linking to you), Domain Authority/Rating (third-party estimates of link strength), anchor text distribution (should look natural — mostly branded and URL anchors), link velocity (rate of new links over time), and toxic link ratio (spammy links that may need disavowing).
⚡Why It Matters
Backlinks remain a top-3 Google ranking factor. Pages with more referring domains rank significantly higher — the median #1 result has 3.8x more backlinks than positions 2-10. However, Google's SpamBrain can now identify and neutralize artificial link patterns at scale.
🔍How AiSEO Checks
AiSEO analyzes backlink profile via free data sources (Moz, Common Crawl): referring domain count, anchor text distribution, toxic link detection, and comparison against competitors in the same niche.
AiSEO Score Impact
Up to 3 points in the Links category (5% of total score)
Fix Difficulty
Editor: Hard | Developer: N/A | AI Agent: Medium