A link audit is a systematic review of your entire backlink profile — every external link pointing to your domain — to assess its quality, identify potential risks, and find opportunities. It is distinct from ongoing backlink monitoring, which tracks changes over time, and from a simple backlink count check. A link audit goes deeper, evaluating the health of each link and the overall patterns that could trigger algorithmic or manual penalties.
When Do You Need a Link Audit?
After an unexplained rankings drop. If your rankings decline without an obvious content or technical explanation, a link audit helps determine whether a toxic link pattern is contributing. Compare the timing of the drop with known Google algorithm updates — a Penguin-correlated drop strongly suggests a link quality issue.
Before starting a new link building campaign. Understanding your current profile before adding new links helps you identify gaps (not enough branded anchors, too few links to inner pages) and risks (existing exact match anchor concentration that makes adding more dangerous) that should inform your strategy.
After acquiring a domain. If you have purchased an existing domain or merged another site into yours, the acquired domain's backlink history comes with it — including any toxic links or previous penalties.
As part of recovering from a manual action. A manual penalty for unnatural links requires a thorough audit as the first step toward cleanup and reconsideration, as we covered in our guide to checking for Google penalties.
Quarterly for active link builders. Sites actively building links should audit quarterly to ensure the profile remains healthy as new links accumulate.
What a Link Audit Examines
Anchor text distribution. The single most audited element. Use our anchor text analyser to visualise your distribution across branded, exact match, partial match, generic, and naked URL anchors. A healthy distribution is dominated by branded and varied natural anchors. As we discussed in our guide to anchor text diversity, exact match should be a small minority.
Link source quality. For each linking domain, assess: Does it have organic traffic? Is it topically relevant? Is it a real editorial site or a link farm? Does it have metrics indicating genuine authority (DR, DA, TF)?
Link velocity. Did your link count grow naturally over time, or were there sudden spikes that might indicate bulk link purchases or a link farm campaign? Unnatural velocity patterns can trigger algorithmic scrutiny.
Link destination distribution. What percentage of your backlinks point to the homepage versus inner pages? A healthy site typically has a mix. A profile where 95% of links point to the homepage looks artificial.
Lost links. Backlinks that pointed to your site but no longer exist. Some loss is natural, but a high rate of lost links may indicate the linking sites found the links low-value and removed them, or that your linked pages have 404 errors worth fixing.
Acting on Your Audit
After identifying issues, prioritise by risk level. Clearly toxic links from obvious spam networks should be disavowed as described in our guide to the disavow tool. Moderate-risk links warrant outreach for removal before disavowing. Opportunities — lost links to live pages, unlinked brand mentions — should be actioned for recovery.
Summary
Run a link audit when rankings drop unexplainably, before launching a link building campaign, after acquiring a domain, or quarterly if you build links actively. Examine anchor text distribution, link source quality, link velocity, and destination distribution. Act on findings with targeted disavow or removal for toxic links and recovery outreach for lost equity.
Missed the previous article? Read: How to Find Broken Links on Other Websites for Link Building