Moz Domain Authority and Page Authority are two of the most popular metrics used by marketers to determine a domain’s capability to rank in the SERP.

Moz’s Domain Authority is a search engine ranking score that predicts how likely a website is to rank in the SERP, with scores ranging from one to 100.

Moz’s Page Authority measures the predictive ranking strength of a single page. Both metrics are calculated using the same methodology and are widely used in the SEO industry.

While Moz is not the only platform that has developed a metric for measuring website authority, it is one of the most respected.

But Is It Really That Much Accurate?

When analyzing Domain Authority (DA), having the same number and standard of links on a website as another website does not guarantee improvement in DA.

Even if the content density is the same, there are almost no meaningful reasons for one website to rank while another does not. DA is a search engine ranking score that predicts how likely a website is to rank in search engine result pages (SERPs).

DA is based on machine learning calculations and is constantly compared against every other website on the internet.

DA is not a Google ranking signal, but it may help predict a website’s performance in search. To improve DA, create quality content on the website, share it, and conduct outreach, asking websites that don’t already link to you for a link to your new page.

Ensure that your site structure is easy for search engines to use for crawling your pages and provides a great user experience for your visitors.

4 Reasons Why Domain Authority is Not An Accurate SEO Metric

Here are the 4 reasons why Domain Authority doesn’t look like the most accurate SEO metrics.

1. Domain Authority Score Of The Sub-domain Is Not Equal To Domain

According to Moz, the domain authority remains the same for a website and its subdomains.

How can this difference be explained?

The accuracy of Domain Authority metrics is questionable, as other websites can get the same DA for their sub-domains just by building links for the main domain.

This creates doubt about the ranking capabilities of sub-domains. Domain Authority measures the predictive ranking strength of entire domains or subdomains, while Page Authority measures the strength of individual pages.

Domain Authority is calculated by evaluating multiple factors, including linking root domains and the total number of links, into a single DA score.

It is important to use Domain Authority as a comparative metric rather than an absolute one.


2. Link Quality Has No Accountability

If you have backlinks from many high-DA websites and someone else has backlinks from a lower-DA website, then the first website should rank.

Many believe that a website with a higher domain authority (DA) will always rank higher in search engine results. However, this is not always the case.

There is no clear argument that explains why this happens. Even if we consider spam scores, the difference in ranking shouldn’t be as high as it is.

In fact, there are many websites that rank easily on rich keywords despite having a DA as low as 40, while other websites with a DA of 50 or 60 ranks lower.

So, in the war of relevance vs domain authority, relevance always wins.


3. It Sometimes Decreases For No Reason

Moz claims that a decrease in backlinks or promotional links detected by the crawler can cause a decrease in a website’s domain authority.

However, there are many instances where the domain authority of websites has decreased for no apparent reason.

Domain authority is calculated using various factors, including the number of linking root domains and the total number of links. 

Moz’s Domain Authority Score is not the only metric for measuring website authority; other SEO platforms have developed similar metrics.

While Google may have metrics similar to Domain Authority, it has denied using Moz’s Domain Authority score in its search results.

Domain Authority (DA) is a logarithmic-based scoring system that predicts how likely a website is to rank in search engine result pages (SERPs).

However, it is not a Google ranking factor but rather a predictor of the likelihood that one domain will outrank another.

The DA score is determined by evaluating multiple factors, including linking root domains and the total number of links, into a single score.

While it is easier to grow your score from 20 to 30 than it is to grow it from 70 to 80, the score should be hard to score up and score down, or at least it should take the same amount of effort in both cases.

In many cases, the DA decreased even when the quality backlink counts increased.


4. Spam Score Is A Spam

Websites like Google Analytics and Yahoo has spam score, but websites that are using duplicate content doesn’t have any spam score. It questions the existence of these metrics, and also, its credibility.

It is believed that the Spam Score depends on the quality of your backlinks. This means, if you get a backlink from a spammed website, Moz will notice it and shows a change increase in your website’s Spam Score accordingly. However, it seems like the network itself is not accurate.

The reason is, it implies that if you are linking to a good website like Google Analytics and Yahoo, or you are getting links from there, then your Spam Score will be affected as those websites have high spam scores.

So, if you are getting backlinks from premium websites such as Google Analytics or Yahoo, you may get a spam score, like really ?!

Also, there is much evidence that websites are having no effect on getting backlinks from many high Spam Websites. And in other cases, websites got spam scores just by linking to a few spammy websites.


5. Inconsistent Algorithm Updates

Domain Authority is based on Moz’s proprietary algorithm, which is not publicly disclosed. As a result, changes to the algorithm and updates made by Moz can lead to sudden shifts in domain scores. This lack of transparency and consistency can make it challenging to rely on DA as a stable and accurate metric for long-term SEO strategies.



Why is Domain Authority important?

DA is important for two main reasons: it helps search engines assess the reliability and trustworthiness of any website, and it is a useful metric to know the status of a website in relation to similar competitors. A high DA does not guarantee a high ranking on search engines, but it can be a useful tool to evaluate the results of digital strategies and to understand the impact that DA and other link-based metrics have on a site’s rankings and popularity. To improve DA, it is important to focus on quality over quantity, and to earn authoritative backlinks over time.

Do You Want A High Or Low Domain Authority?

Generally, a higher domain authority is better because it indicates a stronger ranking potential. However, what is considered a “good” domain authority score can vary depending on the website and its competitors, For example, websites like Google, Apple, or Microsoft will have a high DA (between 95 and 100), Ultimately, it is important to analyze your top competitors and draw conclusions tailored to your own website, based on your ranking as well as the rankings of your competitors.It is also important to note that raising your domain authority is a long-term process that requires quality backlinks and better traffic. While there are several ways to go about it, it is crucial to focus on being a great resource for users

How Is Domain Authority Calculated?

DA is calculated by evaluating multiple factors, including linking root domains and a total number of links, into a single DA score. The actual calculation uses a machine learning model to predictively find a “best fit” algorithm that most closely correlates Moz’s link data with rankings across thousands of actual search results that Moz has collected. The score can then be used when comparing websites or tracking the “ranking strength” of a website over time. It’s worth noting that Moz is not the only SEO platform that has developed a metric for measuring website authority.


I don’t think that just targeting Domain Authority should be your first priority in SEO. You can use Domain Authority for analysis purposes but with remembering the fact that, it is not necessary that the scores explain everything.

I believe Alexa Ranking & Ahref Domain Rating are better metrics than Moz’s domain authority. They seem more accurate and practical. And more than anything, I believe that the success of your SEO is more traffic, which can be earned with relevant content on the website and relevant backlinks to the website.

Vibhu Dhariwal is Director Of Marketing at Digital Gratified, a Digital Marketing & Web Development Company, and Co-Founder of He has helped 25+ SaaS businesses in SEO, content marketing, and Email Marketing. You can connect with him at

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