What Is Domain Authority?

Domain Authority is a predictive SEO metric created by Moz.

The score ranges from 1 to 100 and is intended to estimate a domain’s ability to compete in organic search compared with other websites. Moz calculates the metric using information from its own web index and link data.

The important word is comparative.

A Domain Authority score by itself does not tell you whether a website has “good SEO.”

A score of 25 may appear low until you discover that most competing websites in the same market are between 10 and 20. A score of 60 may appear impressive but provide less competitive advantage if all the websites ranking for an important search are considerably stronger.

Domain Authority becomes most useful when you compare similar websites rather than evaluating the number in isolation.

Is Domain Authority a Google Ranking Factor?

No. Domain Authority is not a Google ranking factor.

Google does not receive your Moz Domain Authority score and use it to decide where your pages should rank.

Google has explicitly explained that authority scores provided by third-party SEO services do not correspond to Google’s own signals.

Google does use links as part of its ranking systems. Its ranking documentation confirms that link analysis systems, including the evolved form of PageRank, continue to be part of its core systems. But that does not make Domain Authority itself a ranking signal.

That distinction matters.

A website may have a relatively high DA and still struggle to rank for a particular search if its page does not satisfy the search intent, lacks relevant content, has technical problems, or faces stronger competition.

A lower-DA website can also outrank a higher-DA website when its individual page is more relevant and useful for a particular query.

For a broader explanation of what actually goes into organic visibility, our complete guide to SEO for growing businesses covers the larger strategy.

What Is a Good Domain Authority Score?

There is no universal Domain Authority score that every business should try to reach.

A “good” DA depends largely on the competitive environment.

If your closest competitors have scores around 20, comparing your business with a global publisher that has a DA above 80 does not tell you much.

A better approach is to compare your site with:

• Direct search competitors
• Businesses in your industry
• Websites ranking for the searches you care about
• Comparable organizations of a similar size and market

The objective is not to reach an arbitrary number such as 40, 50, or 70.

The objective is to understand how your domain compares with the sites competing for the same audience.

Why Does Domain Authority Change?

Domain Authority can fluctuate even when you have not made an obvious change to your website.

That is normal.

Because DA is calculated by a third-party system rather than Google, changes can come from several places.

Moz’s Data and Calculations Can Change

Moz maintains its own web index and calculation system.

As its index changes, new links are discovered, old links disappear, or the model is updated, your Domain Authority score may move.

That means a change in DA does not automatically mean Google sees your website differently.

Your Backlink Profile Can Change

Links are an important part of how Domain Authority is calculated.

Your score may change when websites:

• Link to your site
• Remove existing links
• Change the pages linking to you
• Redirect or remove pages
• Move to different domains
• Become unavailable

The quality and diversity of referring domains matter more than simply accumulating the largest possible number of backlinks.

Other Websites Change Too

Domain Authority is comparative.

Your website does not exist in a vacuum.

Competitors may earn new links, publishers may grow, websites may disappear, and Moz’s understanding of the web can change.

Your relative position can therefore shift even without a major change to your own site.

Should You Worry About a Small Drop in Domain Authority?

Usually, no.

A small DA fluctuation by itself is not enough reason to overhaul your SEO strategy.

First look at what is happening with the metrics that affect your actual business:

• Organic search clicks
• Search impressions
• Rankings for valuable queries
• Leads from organic search
• Conversions
• Indexed pages
• Referral traffic
• Important backlinks

If your Domain Authority drops slightly but your qualified organic traffic and conversions are growing, the DA number should not become the priority.

Likewise, a rising DA score does not automatically mean your SEO strategy is working if traffic, visibility, and leads are declining.

This is one reason businesses should avoid treating third-party SEO metrics as business KPIs.

What Actually Helps Build Website Authority?

Although chasing a DA score should not be your objective, many of the activities associated with a healthy backlink profile are also good SEO practices.

Create Content Worth Referencing

Websites are more likely to link naturally to content that provides something worth citing.

That might include:

• Original research
• Detailed guides
• Useful data
• Case studies
• Tools
• Templates
• Industry resources
• Expert analysis
• Unique insights

Publishing large amounts of generic content does not automatically build authority.

One genuinely useful resource can be more valuable than dozens of pages created simply to target keywords.

Our article Optimizing Your Small Business for Search Engines covers the broader SEO fundamentals that should work alongside off-page authority building.

Earn Relevant Backlinks

A backlink is a link from another website to yours.

Google uses links as one of many signals when evaluating pages and understanding relationships across the web.

But more links are not automatically better.

A relevant link from a trusted organization in your field may be much more meaningful than a large number of links from unrelated or low-quality sites.

Useful ways to earn links can include:

• Publishing original resources
• Participating in industry organizations
• Contributing expertise to reputable publications
• Earning media coverage
• Creating partnerships with relevant organizations
• Developing tools or research others want to reference

The key word is earn.

Google’s spam policies specifically prohibit link schemes such as buying links for ranking purposes, excessive link exchanges, and automated link creation.

Do Not Build Links Just to Increase DA

This is where Domain Authority can become dangerous as a KPI.

If the objective becomes:

“We need to raise our DA from 30 to 40.”

the strategy can quickly turn into chasing links primarily because an SEO tool might reward them.

That is backwards.

A link should make sense because it creates a legitimate connection, referral opportunity, citation, resource, partnership, or signal of real-world credibility.

Increasing a third-party score should be a possible side effect, not the reason the link exists.

Use Competitor Analysis for Context

Domain Authority can be particularly useful when analyzing competitors.

Suppose several websites consistently appear for searches that matter to your business.

Comparing their DA, referring domains, content, and backlink profiles can help you ask better questions:

• Are competitors earning links from industry publications?
• Do they have resources people frequently reference?
• Are local organizations linking to them?
• Are particular pages earning most of their backlinks?
• Are there gaps in the topics or resources available?

DA gives you context.

It does not give you the strategy by itself.

Our article on The Power of Competitor Analysis for Business Growth explains how competitor research can be used more broadly without simply copying what another business is doing.

Look at Pages, Not Just Domains

Another problem with focusing heavily on Domain Authority is that search results are made up of pages, not DA scores.

Google says its core ranking systems are primarily designed to evaluate signals at the individual page level, although some site-wide signals are also considered.

That means a strong domain does not guarantee that every page on that website will rank well.

When evaluating a search opportunity, look at the actual competing pages:

• Does the page answer the searcher’s question?
• How thoroughly does it cover the topic?
• Is it current?
• Does it demonstrate relevant expertise?
• Does it have useful backlinks?
• Is it easy to navigate?
• Does another page provide a significantly better answer?

This is much more useful than asking whether your DA number is high enough.

Measure SEO With More Than One Metric

Domain Authority can be part of your SEO reporting, but it should sit alongside metrics that show what is actually happening.

Depending on your goals, that might include:

• Google Search impressions
• Organic clicks
• Click-through rate
• Keyword visibility
• Organic landing page traffic
• Referring domains
• Backlinks
• Leads
• Phone calls
• Form submissions
• Sales
• Conversion rate

If you are deciding where to invest your time, business outcomes should carry more weight than a third-party score.

Domain Authority vs. Real Search Performance

The easiest way to think about Domain Authority is this:

DA estimates. Google ranks. Your customers convert.

Those are three different things.

Domain Authority can help you understand how one website compares with another.

Google Search determines which pages appear for individual searches using its own ranking systems.

And ultimately, your marketing has to produce something useful for the business, such as visibility, inquiries, customers, or revenue.

Keeping those functions separate prevents a useful SEO metric from becoming a vanity metric.

Frequently Asked Questions About Domain Authority

What does Domain Authority mean?

Domain Authority is a third-party metric developed by Moz that estimates how likely a website is to compete in organic search compared with other websites.

Does Google use Domain Authority?

No. Google does not use Moz’s Domain Authority score as a ranking factor. Google has its own ranking systems and signals.

Why did my Domain Authority drop?

A DA score can change because of backlink changes, updates to Moz’s web index, changes to its calculations, or changes elsewhere in the competitive link landscape.

A small change does not necessarily indicate an SEO problem.

Can a website with lower Domain Authority outrank a website with higher DA?

Yes.

Google ranks pages based on many signals, not on Domain Authority. A more relevant or useful individual page can outrank content from a domain with a higher third-party authority score.

Should I try to increase my Domain Authority?

You should focus on improving the underlying quality and visibility of your website rather than targeting a specific DA number.

Creating strong content, earning legitimate relevant links, improving your website, and attracting the right search traffic are more meaningful objectives.

How often should I check Domain Authority?

You do not need to monitor DA daily.

It is more useful as a periodic competitive benchmark alongside backlink growth, organic visibility, traffic, and business conversions.

Use Domain Authority as a Signal, Not a Scorecard

Domain Authority can be useful when it is used for what it was designed to do: provide a comparative view of a website’s potential strength in search.

It becomes less useful when businesses treat the number as Google’s opinion of their website or as the ultimate goal of SEO.

Track it.

Compare it.

Use it to investigate competitors and backlink opportunities.

But do not optimize your business around it.

Build a website that deserves visibility, create content people actually need, earn legitimate references from other websites, and measure whether organic search is producing results.

That is a much stronger SEO strategy than chasing an authority score.