Table Of Contents
Introduction
If you have ever explored the world of Search Engine Optimization, you have probably come across the term Page Authority, often abbreviated as PA. But what exactly does it mean? Where does it come from? And why do so many SEO professionals talk about it as if it is one of the most important numbers in digital marketing?
This guide is designed to answer all of those questions in plain, simple language. Whether you are brand new to SEO or you have some experience and want to deepen your understanding, this article will walk you through everything you need to know about the Moz PA score – what it is, how it works, why it matters, and how you can use it to improve your website’s performance in search engines.
By the time you finish reading this guide, you will have a clear and thorough understanding of Moz Page Authority and how to apply that knowledge in real-world SEO work.
Understanding the Basics: What Is Moz PA Score?
The Moz PA score, or Page Authority, is a metric developed by Moz – one of the most respected SEO software companies in the world. It is a numerical score that predicts how likely a specific web page is to rank well in search engine results pages, commonly known as SERPs.
The score runs on a scale from 1 to 100. A score of 1 is the lowest possible, meaning the page has very little ability to rank. A score of 100 is the highest possible, and pages that achieve scores in the 70s, 80s, and beyond are typically powerful, well-established pages on highly authoritative websites.
Key Point: Page Authority is a predictive score, not a guarantee. A high PA score means a page has strong potential to rank well, but search engines use many other signals when determining actual rankings.
Moz created Page Authority as a way to give website owners, marketers, and SEO professionals a quick, reliable way to evaluate the relative strength of any given web page. Instead of having to analyze dozens of different signals manually, you can look at the PA score and get a fast snapshot of how competitive that page might be.
The Origin of Page Authority
Page Authority was created in the early days of modern SEO, when Moz was first building its suite of tools. Moz recognized that webmasters needed a standardized way to measure and compare the strength of web pages, so they developed a machine learning model that could analyze multiple link-related signals and condense them into a single, easy-to-read number.
Moz’s model draws from a large index of links collected by their web crawler, called Mozbot. This crawler continuously scans the web, discovering links between pages and storing that data in Moz’s link index. The PA score is then calculated based on the patterns found in that link data.
Page Authority vs Domain Authority: What Is the Difference?
Many beginners confuse Page Authority with Domain Authority (DA), another metric created by Moz. While they are related, they measure different things:
- Page Authority (PA) measures the ranking potential of a single, specific page on a website.
- Domain Authority (DA) measures the overall ranking potential of an entire domain or website.
Think of it this way. If a website were a city, Domain Authority would measure the strength and reputation of the city as a whole, while Page Authority would measure the strength of a specific building or landmark within that city.
A website can have a strong DA score, but individual pages within that website may have varying PA scores depending on how many links point specifically to those pages.
How Is the Moz PA Score Calculated?
Understanding how the PA score is calculated helps you understand how to improve it. While Moz does not release the full technical details of its algorithm – similar to how Google does not release every detail of its ranking algorithm – the company has provided enough information for us to understand the core principles.
Link Data as the Foundation
The most important factor in Page Authority is links. Specifically, Moz looks at the number and quality of external websites that link to a particular page. These incoming links are called backlinks.
Not all backlinks are equal. A link from a well-respected, high-authority website carries far more weight than a link from an obscure, low-quality website. This is because Moz’s model considers the authority of the linking page when calculating the benefit it passes to your page.
Example: A single backlink from a major news site like BBC News or The New York Times is worth significantly more than 100 backlinks from random, low-quality blogs that nobody reads.
The Role of MozRank and MozTrust
Two underlying metrics feed into the PA score:
- MozRank reflects the popularity of a page based on the quantity and quality of links pointing to it. It works on a similar principle to Google’s original PageRank algorithm.
- MozTrust measures how closely a page is connected to trustworthy, authoritative sources on the web. Pages that receive links from highly trusted sources – such as educational institutions, government websites, and major publications – receive higher MozTrust scores.
These two metrics together help paint a picture of how both popular and trustworthy a page is, which feeds into the final PA calculation.
Machine Learning and the PA Algorithm
Moz uses a machine learning model to calculate Page Authority. This model is trained on data about what types of link profiles tend to correlate with high rankings in Google’s search results. Over time, as Google updates its algorithm and as web patterns shift, Moz retrains its model to keep the PA score as accurate and relevant as possible.
This is why you may notice occasional changes to PA scores across the web, even if nothing on your page or its link profile has changed. Moz periodically recalibrates the model, which can cause scores to shift up or down slightly across the board.
The Logarithmic Scale Explained
One important thing to understand about the PA scale is that it is logarithmic, not linear. This means that the higher your score already is, the harder it becomes to increase it further.
For example, moving from a PA score of 10 to 20 is much easier than moving from 70 to 80. The difference in actual link authority and page strength between those two ranges is enormous. This is a deliberate design choice, as it mirrors the way actual web authority tends to be distributed – a relatively small number of pages hold a large concentration of the web’s authority.
Why Does Moz PA Score Matter for SEO?
Now that we know what the PA score is and how it is calculated, the next logical question is: why should you care about it? What practical value does this number have for your SEO strategy?
A Quick Competitive Benchmark
One of the most immediate and practical uses of PA is competitive benchmarking. When you type a keyword into a search engine and want to rank for it, you are competing against other pages that are already ranking for that term. By checking the PA scores of those competing pages, you can quickly assess how difficult the competition will be.
If the pages currently occupying the top spots all have PA scores of 70 and above, you know you are up against very strong competition. If they have PA scores in the 20s and 30s, there may be more realistic opportunity for a newer or less established page to compete.
Link Building Prioritization
When you are building backlinks for your website, you have choices to make. You cannot pursue every possible link opportunity, so you need to prioritize. PA scores can help you decide which linking opportunities are most valuable.
If website A has a PA score of 65 and website B has a PA score of 15, a backlink from website A is likely to be far more beneficial to your own PA score than one from website B. By targeting high-PA pages when pursuing backlinks, you are making a more strategic and efficient use of your link-building efforts.
Evaluating Content Performance
By tracking the PA scores of your own pages over time, you can see which content is earning links naturally and growing in authority. Pages that are attracting backlinks will see their PA scores rise, while pages that are not earning links may stagnate.
This gives you useful feedback on the quality and appeal of your content. If a page has been live for several months and its PA score is not improving, it may be a signal that the page needs better content, more promotion, or a more targeted link-building campaign.
Understanding Your Website’s Authority Distribution
A healthy website typically has a few high-PA pages – usually the homepage and a few cornerstone content pieces – and many other pages with moderate or lower PA scores. By reviewing the PA distribution across your site, you can identify which pages have strong authority and which ones might benefit from internal linking from those high-PA pages.
This practice of strategically distributing page authority through internal links is an important and often overlooked aspect of SEO.
What Is a Good Moz PA Score?
A question that comes up very often is: what is a good PA score? The answer is that it depends heavily on context, particularly on what you are trying to rank for and who your competitors are.
That said, here is a general framework for interpreting PA scores:
PA Score Ranges and What They Mean
1 to 20 – Beginner Level
Pages in this range are typically very new, have few or no external backlinks, and have not yet established any real authority on the web. Most brand new websites will start in this range. Ranking competitively for popular keywords will be very difficult from this level.
21 to 40 – Developing Authority
Pages in this range have started to build a backlink profile and have some established authority. They may be able to rank for less competitive, long-tail keywords. Many pages on legitimate, active websites fall into this category.
41 to 60 – Moderate to Strong Authority
Pages in this range have a solid backlink profile and a meaningful level of authority. They are capable of competing for moderately competitive keywords and are often well-established pages on respected websites.
61 to 80 – High Authority
Pages reaching this range have accumulated a strong collection of high-quality backlinks. They are typically found on major websites, popular publications, and well-known brands. Competing against these pages for broad, high-volume keywords requires significant SEO effort.
81 to 100 – Elite Authority
Very few pages reach this range. Pages with PA scores above 80 are typically found on some of the most linked-to pages on the internet – major Wikipedia articles, homepage-level pages of global media companies, or highly viral content pieces that have earned thousands of links from authoritative sources worldwide.
Important Reminder: Always compare PA scores within the context of your niche and the specific keywords you are targeting. A PA of 35 might be highly competitive in one niche but weak in another.
How to Check Your Moz PA Score
Checking the PA score of any page is straightforward, and Moz provides several ways to do it.
Moz Link Explorer
The primary tool for checking PA is Moz Link Explorer, which is available at Moz’s official website. You can enter any URL into the search bar, and Link Explorer will return a detailed breakdown of that page’s link profile, including its PA score, the number of linking domains, and the quality of those links.
Moz offers a limited number of free searches per day with a free account. For more extensive research, a paid Moz Pro subscription is required.
MozBar – The Free Browser Extension
One of the most popular and convenient ways to check PA scores is through MozBar, a free browser extension available for Chrome and Firefox. Once installed, MozBar displays the PA and DA scores for every page you visit and every result that appears in search engine results pages.
This makes it incredibly easy to analyze the competitive landscape for any keyword without having to switch to a separate tool. As you browse search results, you can instantly see the PA scores of each ranking page.
Third-Party SEO Tools
Many third-party SEO tools and platforms have integrated Moz data into their interfaces. Tools like Ubersuggest, SEMrush, and various rank tracker platforms may display PA scores alongside other metrics. However, for the most accurate and up-to-date PA data, checking directly through Moz’s own tools is recommended.
Bulk PA Checking
If you need to check the PA scores of many pages at once, Moz Pro offers bulk analysis features. You can upload a list of URLs and receive PA scores and link data for all of them in one batch. This is particularly useful for competitive research or when auditing a large website.
How to Improve Your Moz PA Score
If your pages have low PA scores, the good news is that there are concrete, actionable strategies you can use to improve them. Since PA is primarily driven by backlinks, improvement efforts largely focus on earning more and better quality links.
1. Earn High-Quality Backlinks
The single most powerful way to increase your PA score is to earn backlinks from pages that themselves have high authority scores. These links transfer what SEO professionals call link equity – sometimes also called link juice – to your page.
Strategies for earning high-quality backlinks include:
- Creating exceptional content that others naturally want to reference and link to.
- Publishing original research, data studies, or industry reports that journalists and bloggers will cite.
- Guest posting on reputable websites within your industry.
- Building relationships with influencers and thought leaders who may link to your work.
- Creating infographics, tools, or calculators that others find useful enough to embed and link back to.
2. Fix Broken Links Pointing to Your Page
If any websites are linking to a page on your site that no longer exists – returning a 404 error – those links are essentially wasted authority. By identifying these broken inbound links and redirecting them to relevant, live pages, you can recover that link equity.
Tools like Moz Link Explorer can help you find these broken inbound links so you can take action.
3. Use Internal Linking Strategically
While external backlinks from other websites are the primary driver of PA, internal links from your own high-authority pages can also help distribute authority to lower-PA pages on your site.
By linking from a high-PA page – such as your homepage or a popular blog post – to a page you want to strengthen, you help pass some of that page’s authority down to the target page. This is known as internal link sculpting.
4. Remove or Disavow Low-Quality Links
In some cases, having many low-quality or spammy backlinks pointing to your page can hurt rather than help you. Google may penalize pages that appear to be using manipulative link schemes, and even in Moz’s model, the quality of links matters as much as the quantity.
If you have accumulated harmful backlinks – perhaps from spam campaigns, link farms, or paid link networks – you should consider using Google’s Disavow Tool to tell Google to ignore those links. While this will not directly change your PA score, it can help with your overall search performance.
5. Create Content That Earns Links Naturally
The most sustainable long-term strategy for improving PA is to consistently create content that earns links naturally. This means publishing articles, guides, tools, and resources that are so genuinely useful and well-researched that other website owners are motivated to reference and link to them without you having to ask.
This type of content is often called linkable assets, and it is the backbone of a healthy, long-term link-building strategy.
6. Promote Your Content Actively
Creating great content is necessary but not sufficient on its own. You also need to actively promote it so that people in your industry or niche actually find and read it. Share your content through email newsletters, social media, industry forums, and communities. The more visibility your content gets, the higher the chance that someone with an authoritative website will decide to link to it.
Common Misconceptions About Moz PA Score
There are several widespread misunderstandings about PA that can lead to poor SEO decisions. Let us address the most common ones.
Misconception 1: A Higher PA Guarantees Higher Rankings
PA is a predictive metric, not a direct ranking factor. Google has confirmed that it does not use Moz’s PA score in its ranking algorithm. PA is Moz’s prediction of how well a page might rank, based on its own analysis of link signals. A page with a high PA might rank well, but so can a page with a lower PA if it provides exceptional content, fast loading speed, and a great user experience.
Misconception 2: PA Is the Same as Google PageRank
While PA was inspired by and designed to correlate with Google’s PageRank, they are not the same thing. Google’s PageRank is a proprietary metric that Google uses internally and no longer publicly displays. Moz’s PA is a third-party estimate that attempts to approximate what PageRank and other authority signals might look like, but it is Moz’s own independent calculation.
Misconception 3: PA Can Be Increased Quickly
Building genuine page authority is a slow process. Because it depends on earning high-quality backlinks, and because quality links take time to accumulate, you should expect PA improvement to happen over months, not days or weeks. Be skeptical of any service or tool that promises to dramatically boost your PA in a short period of time.
Misconception 4: Only High-PA Pages Can Rank
This is not true, and it is an important point for beginners to understand. Many pages with relatively modest PA scores rank very well for specific queries, particularly when those queries have low competition or when the page provides an exceptionally clear and relevant answer to the search intent.
SEO is about much more than just authority. Relevance, content quality, user experience, and technical optimization all play crucial roles in determining where a page ranks.
Misconception 5: PA and DA Are Interchangeable
As explained earlier, PA measures a specific page while DA measures the entire domain. A page on a high-DA website does not automatically have a high PA score. Each page earns its own PA based on the links pointing directly to that page.
Moz PA Score in Relation to Other SEO Metrics
PA does not exist in isolation. It is most useful when analyzed alongside other metrics that together give a fuller picture of a page’s SEO strength and potential.
PA and Domain Authority (DA)
As discussed, DA reflects the overall strength of the entire domain, while PA reflects a specific page. Looking at both together helps you understand whether a page is benefiting from the general authority of its domain, or whether it has earned its own independent strength.
PA and Spam Score
Moz also calculates a Spam Score for pages and domains, which estimates the likelihood that a page is spammy or low-quality based on patterns associated with penalized websites. When evaluating a potential link opportunity, it is wise to look at both the PA and the Spam Score. A high PA paired with a high Spam Score is a red flag.
PA and Keyword Difficulty
When doing keyword research, understanding the PA scores of pages currently ranking for your target keyword gives you a much more nuanced view of keyword difficulty. Some keyword difficulty tools incorporate PA-like metrics into their calculations to estimate how hard it would be to rank for a given keyword.
PA and Organic Traffic
PA and organic traffic are related but not the same. A page might have a high PA because it has earned many links, but if the content it covers is on an obscure topic that very few people search for, it may still receive very little organic traffic. Conversely, a page with a modest PA might receive substantial traffic if it ranks highly for a high-volume keyword.
How Moz Updates the PA Score
Moz does not calculate PA scores in real time for every page on the web. Instead, the PA scores you see in Moz tools are based on periodic crawls of the web, during which Mozbot collects link data and Moz processes that data through its algorithm.
This means that changes to a page’s backlink profile – whether gaining new links or losing old ones – are not reflected immediately in the PA score. There can be a delay of several weeks or even months before significant changes in a link profile show up in the PA score.
Why PA Scores Sometimes Drop
It is not uncommon for website owners to notice that their PA scores have dropped, even when they believe they have been doing things correctly. There are several explanations for this:
- Moz has recalibrated its algorithm, causing scores to shift across the web.
- Pages that were linking to your content have removed those links or gone offline.
- Moz’s crawl has discovered new low-quality links pointing to your page.
- Competing pages in your niche have gained significant new authority, shifting the relative competitive landscape.
A small dip in PA score should not cause alarm. It is the long-term trend that matters most.
Practical Tips for Using PA in Your SEO Strategy
Let us bring everything together with some practical tips for incorporating PA into your day-to-day SEO work.
Tip 1: Use PA for Competitive Analysis Before Targeting a Keyword
Before creating content to target a specific keyword, check the PA scores of the pages currently ranking for it. If every result on the first page of Google has a PA score well above yours, you may want to look for lower-competition variations of that keyword first while you build your authority.
Tip 2: Prioritize Your Best Pages for Link Building
Rather than spreading your link-building efforts equally across all pages on your site, identify two or three cornerstone pages – your most important and high-quality content – and focus on building links to those pages first. Once those pages develop strong PA scores, you can use internal links to distribute that authority to other pages on your site.
Tip 3: Monitor PA Trends Over Time
Set up a regular schedule to check the PA scores of your key pages. Tracking these scores over time – say, once a month – gives you a clear picture of whether your link-building efforts are paying off and whether your overall authority is growing.
Tip 4: Evaluate Link Opportunities Using PA
Whenever you are considering a link-building opportunity – whether it is a guest post, a directory listing, a partnership, or a resource page link – check the PA score of the specific page that would link to you. This helps you prioritize the highest-value opportunities.
Tip 5: Do Not Obsess Over PA at the Expense of Content Quality
Perhaps the most important piece of advice is not to let PA become an obsession that distracts you from the fundamentals. Great content, a positive user experience, fast loading times, and solid technical SEO are the bedrock of any successful SEO strategy. PA is a useful measurement tool, but it is not a goal in itself.
The Limitations of Moz PA Score
Like any metric, PA has limitations that you should be aware of.
- It only measures one dimension of SEO. PA reflects link-based authority and does not account for content quality, user experience, technical SEO factors, or behavioral signals like click-through rates.
- It is a third-party estimate, not a first-party signal. Moz does not have access to Google’s actual data, so PA is an approximation, not a perfect reflection of how Google evaluates a page.
- It can be manipulated in the short term. Although Moz works to filter out spam links, it is technically possible to inflate PA scores artificially by building large quantities of low-quality links. These inflated scores may not translate into actual ranking improvements.
- The logarithmic scale makes improvement harder at higher ranges. As mentioned earlier, improving a high PA score becomes increasingly difficult, which means the metric can feel like a diminishing returns situation.
- Score fluctuations due to algorithm updates. When Moz updates its model, scores across the entire web can shift, sometimes significantly, making it difficult to interpret changes as purely the result of your own actions.
Conclusion
Moz’s Page Authority score is one of the most useful and widely recognized metrics in the SEO industry. It gives you a fast, reliable way to assess the relative strength of any web page, compare your pages against competitors, evaluate link-building opportunities, and track your progress over time.
Understanding the Moz PA score means understanding that authority on the web is built through earning links from other respected pages. It is a process that takes time, consistency, and a genuine commitment to creating valuable content and building real relationships within your industry or niche.
While PA is not a direct ranking factor in Google’s algorithm, it is a strong proxy for many of the signals that do influence rankings. By monitoring and working to improve your PA scores – while keeping an equal focus on content quality, technical performance, and user experience – you are building a stronger, more competitive website that is well-positioned to earn better visibility in search engines.
Whether you are just starting out in SEO or looking to sharpen your strategy, keeping an eye on Moz PA scores is a smart and practical habit that can guide your decision-making and help you achieve your goals more efficiently.
About the Author
Jay Patel is the Founder of XSquareSEO, a full-service SEO agency with experience in on-page SEO, eCommerce SEO, link building, technical SEO, SaaS SEO, and local SEO. For more information, feel free to contact us.
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