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Domain Authority

Domain Authority is Moz proprietary score estimating how likely a website is to rank compared with other sites, on a 1-to-100 scale. It is built largely from link data. It is not a Google ranking factor or a universal measure of website quality.

From the Money Master HQ dictionary, founded by Shihan Sheriff (FCMA, VP of Finance at Nomod, CFO at Esanjo Ventures). How these definitions are written.

What it means

A business may see a Domain Authority score in an SEO report, and the number can help compare sites inside Moz data and methodology but should not be read as a grade assigned by Google. Moz says its score is relative, calculated by a machine-learning model and heavily influenced by backlinks, and that Domain Authority is not a direct Google ranking factor.

That distinction should appear near the definition, not as a footnote. A fictional local shop has a score of 25 while a national publisher has 80, and the publisher's larger site and link profile may explain the gap, although the shop can still rank for specific local searches that fit its customers.

A score can change even if the site makes no visible change, because the tool index, model or comparison set can move, so do not assume every point change reflects a real gain or loss in search traffic. Other SEO platforms offer their own authority scores using different data and formulas, so a 40 in one tool is not directly comparable with a 40 in another.

Domain Authority is measured at the domain level, whereas individual pages may perform differently, and a relevant, well-written page on a modest site can answer a specific query better than a generic page on a large site. A high score does not guarantee that a page will rank, since search intent, content, technical access and competing results matter, and a score is not a substitute for checking actual visibility.

A fictional consulting firm that gains links from genuine trade resources but sees no immediate score change can still receive useful visitors from those references, so treat the metric as one signal, not the final outcome. A low score on a new domain is normal, because it takes time for a tool to discover links and model a site, so avoid paying for artificial links merely to raise a third-party number.

Link quantity and link relevance differ, since an unrelated directory network can inflate counts without helping readers, so seek references that make sense for the content and audience. Track organic traffic, qualified enquiries and relevant keyword visibility alongside the score, as these measures better reflect business outcomes though they also have attribution limits, and set a goal before choosing a dashboard.

When benchmarking competitors, compare sites with similar purpose and market, because a multinational news outlet is not the right yardstick for a neighbourhood service firm. A sudden score drop may justify checking lost links or technical changes, but verify the source pages are actually gone before asking someone to restore them, since tool data can lag.

A score increase can coincide with no traffic change because the site may rank for queries that bring little useful demand, so improve content for real customer questions, not only for the score. The Moz scale is not a simple percentage, so a score of 60 is not twice as strong as 30, and point differences should not be turned into an invented probability of ranking.

A backlink from a reputable site is not automatically helpful if the destination page is broken, so maintain redirects and useful content that matches the link promise. A report should name the provider, date, scope and competing sites and avoid presenting the number as an official search-engine certification, and although some teams use authority scores to shortlist outreach prospects, that is a starting filter, not a replacement for reading a site, so judge SEO by actual search performance and whether visitors find value.

In practice

Real-world examples.

1

Example

A local business compares its Moz score with similar local competitors. It picks three rivals of a similar size in the same city rather than a national brand. The comparison shows where its link profile is thin.

2

Example

A new domain gains relevant links without an immediate score change. The team keeps the referral visitors and records the links, rather than paying for artificial ones to move the number. The score catches up later as the tool discovers the links.

3

Example

A report labels the provider and date of an authority score. A client reading it months later can tell which tool and data produced the figure. The report also lists the competing sites used.

Formula

Calculation

Moz does not publish a simple reproducible Domain Authority formula. It uses a proprietary model; the displayed result ranges from 1 to 100. Because there is no formula to calculate, a sensible report pairs the score with business outcomes. For example, a fictional shop whose score moves from 25 to 28 gains 3 points, but if qualified enquiries rise from 40 to 44 a month, that is a 4 / 40 = 10% increase, and the two figures should be reported side by side without assuming one caused the other.

Case study

Seen in the real world.

In this fictional case, Lime Studio sees its Moz Domain Authority move from 25 to 28. Its team checks whether qualified organic visits and enquiries also changed. It labels the tool and date in the report. The team also checks whether any referring pages were lost or any redirects broken, since a tool update alone can move a score. It does not claim that Google awarded three extra ranking points, and it sets the next review date so the trend is read over months, not days.

Watch out

Common mistakes.

  • Calling Domain Authority a Google metric.
  • Comparing scores from different tool providers directly.
  • Treating a score rise as proof of more sales.

Questions

People also ask.

Does Google use Moz Domain Authority?

No. Moz says it is not a direct Google ranking factor.

Can the score change without my site changing?

Yes. Tool data, modelling and comparison sites can change.

What else should I measure?

Relevant traffic, query visibility and useful customer outcomes.

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Last updated · October 8, 2026
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