Ahrefs

Ahrefs is a subscription SEO platform best known for its backlink index, keyword research tools and competitor analysis. It runs its own web crawler, AhrefsBot, to build a large database of pages and links, then estimates metrics such as search traffic, keyword difficulty and site authority.

Written by Paul Hoda, SEO consultant since 2005. Last updated 8 November 2026.

Main tools in Ahrefs

  • Site Explorer: shows a domain’s estimated organic traffic, ranking keywords, top pages and backlinks.
  • Keywords Explorer: provides search volume, difficulty scores, related terms and SERP history for keyword research.
  • Site Audit: crawls your site to find technical issues such as broken links, redirects and missing tags.
  • Rank Tracker: monitors positions for a set of keywords over time.
  • Content Explorer: finds popular content on a topic, useful for ideas and outreach.

Ahrefs has also added features for monitoring brand visibility in AI search tools, reflecting the growth of AI visibility as a concern.

Key Ahrefs metrics

Domain Rating (DR) scores the strength of a site’s backlink profile on a scale from 0 to 100. URL Rating (UR) does the same for a single page.

Keyword Difficulty (KD) estimates how hard it is to rank in the top ten, based mainly on the backlinks of current ranking pages. Organic traffic figures are estimates calculated from rankings, search volumes and assumed click-through rates.

These are Ahrefs’ own metrics. Google does not use DR, UR or KD, so they are best treated as comparative guides rather than ranking factors.

How SEOs use Ahrefs

  1. Competitor research: see which keywords and pages bring competitors traffic, as part of competitor analysis.
  2. Content gap analysis: find keywords competitors rank for that you do not.
  3. Link research: review new and lost links, referring domains and anchor text, and find link opportunities.
  4. Broken link checks: spot broken pages with backlinks so they can be redirected.
  5. Technical checks: run regular audits to catch site issues.

Ahrefs Webmaster Tools

Ahrefs offers a free version called Ahrefs Webmaster Tools for site owners who verify their websites. It includes Site Audit and Site Explorer data for your own verified sites, with more limited features than the paid plans. It can be a useful starting point for smaller businesses alongside Google Search Console.

Getting started

New users often begin by entering their own domain into Site Explorer to see which pages and keywords already bring traffic, then adding two or three close competitors. Comparing top pages side by side quickly shows where a competitor has content you lack. Setting up a project with Site Audit and Rank Tracker turns those one-off checks into regular monitoring that can be reviewed each month.

Limitations to keep in mind

  • Traffic and search volume figures are estimates and can differ widely from your analytics data.
  • No third-party tool sees every backlink. Ahrefs, Semrush and others each have different indexes.
  • Metrics such as DR can be inflated by low-quality links, so always review link quality manually.
  • Google Search Console remains the authoritative source for your own site’s clicks and impressions.

Key Takeaways

  • Ahrefs is a subscription SEO platform known for backlink and keyword data.
  • It runs its own crawler, AhrefsBot, to build its link index.
  • Domain Rating, URL Rating and Keyword Difficulty are Ahrefs metrics, not Google ones.
  • Traffic and volume figures are estimates and should be checked against your own data.
  • Ahrefs Webmaster Tools offers free data for sites you verify.

Related Terms

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