Published in: Brand Authority

What is Domain Authority

Author Isaiah Levin

Published on: 06/02/2026

What Is Domain Authority? The Complete Guide to Understanding and Improving DA

If you have spent any time researching SEO, you have almost certainly come across the term Domain Authority. But what is Domain Authority, exactly? Domain Authority (DA) is a search engine ranking score developed by Moz that predicts how likely a website is to appear in search engine results pages (SERPs). The score ranges from 1 to 100, with higher numbers indicating a stronger ability to rank. It is not a metric that Google itself uses—it is a third‑party predictive tool—but it has become one of the most widely referenced benchmarks in the SEO industry for comparing website strength and tracking progress over time.

Understanding what is Domain Authority matters because it gives you a quick, data‑driven snapshot of how your site stacks up against competitors in your niche. A site with a DA of 55 competing against rivals in the 30–40 range is in a strong position; the same DA of 55 in a niche where the top players score 70+ signals room for growth. Throughout this guide you will learn exactly how DA is calculated, what factors influence it, what constitutes a good score for your industry, how DA differs from Page Authority and other authority metrics, and the most effective strategies to raise your own DA over time.

What Is Domain Authority and How Does It Work?

To fully answer the question “what is Domain Authority,” you need to understand where it comes from and what it actually measures. Domain Authority was created by Moz, an SEO software company, as a way to estimate the overall ranking strength of a domain. Moz first introduced the metric in 2004, and it quickly became a widely used standard for evaluating a website’s link‑based authority. Other major SEO tools eventually followed with their own versions: Ahrefs launched Domain Rating (DR), Majestic introduced Trust Flow, and Semrush developed Authority Score, each using its own proprietary methodology.

The DA score is calculated on a logarithmic scale from 1 to 100. Logarithmic means it is much easier to grow your score at the lower end than at the top. Improving from DA 10 to DA 20 might take a few months of focused effort, while improving from DA 70 to DA 80 could take years and require exponentially more high‑quality backlinks. Industry‑wide studies from Moz have shown that huge sites like Wikipedia and major social networks sit at or near DA 100, while the typical small website tends to cluster at much lower scores. In practice, your goal is not to “max out” DA, but to understand what range is realistic in your niche and then climb steadily within that range.

DA 2.0: The Modern Algorithm

In March 2019, Moz released a major overhaul called Domain Authority 2.0. The update replaced the old linear regression model with a neural network—a machine learning algorithm that gets more accurate over time as it is trained on more SERP data. DA 2.0 also introduced new spam detection factors, link manipulation identification, and a refreshed training set that seeds random non‑ranking pages to help the model learn about sites that never appear in search results at all. These changes significantly improved DA’s ability to predict actual SERP performance and made it harder for spammers and link sellers to inflate their scores artificially.

While Moz does not publicly disclose the exact formula, they have shared that the primary inputs into DA 2.0 include the quantity of links, the number of unique linking root domains (referring domains), spam signals, and overall link quality. The algorithm evaluates all of these through its machine learning model to produce a single predictive score. Importantly, DA is recalculated with each Moz index refresh, which typically happens roughly once or twice per month. That means your DA can move even if you have not made visible changes, simply because the broader link graph Moz uses has changed.

Key Factors That Influence Domain Authority

Now that you know what is Domain Authority at a conceptual level, it is time to examine the specific factors that shape your score. These can be grouped into three broad areas: link‑related factors, content‑related factors, and technical factors. Moz emphasizes links most strongly, but your content and technical setup influence the kind of links you attract and how well link equity flows through your site.

Link-Related Factors

Backlinks remain the single most important driver of Domain Authority. The Moz algorithm evaluates your link profile from multiple angles, not just raw link counts.

• Number of linking root domains: This is the count of unique websites that link to your domain. A hundred links from ten different websites carry less weight than ten links from ten different websites, because domain diversity signals broader trust and visibility across the web.
• Quality of linking domains: A link from a high‑authority news publication or respected industry site usually carries far more weight than a link from a brand‑new personal blog. The “neighborhood quality”—meaning the authority and cleanliness of sites linking to the sites that link to you—matters as well, which is why tools like Moz and Ahrefs give each domain its own authority score.
• Link profile diversity: DA takes into account the variety of IP addresses, top‑level domains (TLDs), and anchor text patterns in your backlink profile. A natural profile includes a mix of branded anchors, partial‑match anchors, generic anchors (“click here”), and even some nofollow links.
• Link relevance: Receiving links from websites that are topically related to your own strengthens your authority signal. A link from a healthcare journal to a medical practice carries more topical weight than the same link from an unrelated entertainment blog.

Content-Related Factors

While DA is primarily a link‑based metric, the quality and scope of your content indirectly shape your score because strong content attracts more and better backlinks. In guides on authority metrics from sources like Moz’s own blog and major SEO publications, content is consistently highlighted as the engine of natural link growth.

• Content quality and depth: Websites that consistently publish well‑researched, original, and comprehensive content tend to earn more organic backlinks over time. Long‑form guides, data studies, and in‑depth tutorials are especially likely to attract citations.
• Topical authority: Having many interlinked pages on a single subject creates what SEO professionals call topical authority. This cluster approach can allow a lower‑DA site to outrank larger competitors because search engines view it as a specialist rather than a generalist.
• Content freshness: Regularly updating existing content and publishing new material sends signals that your website is active and maintained, which can indirectly support link acquisition and DA growth.

Technical Factors

Technical SEO does not directly feed into Moz’s DA formula, but poor technical health can undermine the link equity your site has earned. Google’s documentation on search essentials and page experience highlights how technical issues can impact crawling, indexing, and user behavior, all of which affect your ability to benefit from links.

• Site speed and Core Web Vitals: A fast, responsive website encourages visitors to stay, engage, and share or link back to your content. Poor Core Web Vitals can act like “leaks” that waste your link equity because authority cannot flow efficiently through a slow or unstable site.
• Mobile responsiveness: With the majority of web traffic now coming from mobile devices, a mobile‑friendly site is essential for attracting and keeping the user engagement that leads to natural backlinks.
• Crawlability and site architecture: A well‑structured website with clean internal linking, proper use of canonical tags, and a logical URL hierarchy helps search engines and Moz’s crawler index your pages completely, ensuring all of your link equity is discovered and counted.

What Is a Good Domain Authority Score?

One of the most common follow‑up questions after “what is Domain Authority” is “what counts as a good score?” The key thing to understand is that DA is a comparative, not an absolute, metric. A “good” DA is one that is competitive in your specific niche and market. A DA of 45 might be excellent for a local plumbing company but below average for a national financial publisher.

For meaningful benchmarking, always compare your DA against direct competitors rather than against websites outside your vertical. Look at who currently ranks on page one for your target keywords, and use their DA scores as your benchmark range. If all top‑10 results sit between DA 25 and DA 40, you do not need DA 70 to compete—you need to reach the upper end of that actual competitive band.

General DA Ranges and How to Interpret Them

A useful practical rule is to identify the median DA of the top 10 results for your primary keyword, then set your medium‑term target roughly 5–10 points above that median. That buffer gives you room to absorb algorithm changes and competitor improvements without immediately losing positions.

How Domain Authority Affects SEO Performance

A critical part of understanding what is Domain Authority is knowing what it can—and cannot—do for your SEO. Domain Authority is not a direct Google ranking factor. Google representatives have repeatedly stated in Search Central blog posts and office hours that they do not use any third‑party authority metric, including DA, DR, or Authority Score, in their algorithms. Instead, they use their own signals to evaluate links and overall site quality.

However, DA strongly correlates with many of the signals Google does use, particularly the quality and quantity of backlinks. Studies from Moz and independent SEO researchers have shown that pages from higher‑DA sites tend to rank more easily and occupy more top‑10 positions than pages on low‑DA sites. This correlation exists because DA is essentially a model of link‑based authority: if your site has a strong, diverse, high‑quality backlink profile—the kind that earns a high DA—it is also likely to perform well in Google’s own evaluation.

The best way to think about DA is as a thermometer: it does not cause your rankings, but it gives you a reasonably accurate snapshot of your site’s overall link authority compared with others. Rising DA alongside rising organic traffic is a good sign that your link‑building and content strategies are working. Falling DA, especially when competitors are rising, is a signal to review your efforts and look for issues in links, content, or technical health.

Domain Authority vs. Page Authority

Moz produces two related but distinct metrics: Domain Authority and Page Authority (PA). Understanding the difference is important for building a well‑rounded SEO strategy, because it helps you judge both your overall domain strength and the power of specific URLs.

In practice, you use DA to decide how ambitious your keyword targets can be overall, and PA to decide which specific pages to prioritize for on‑page optimization, outreach, and internal linking. High‑PA pages often make good candidates for further promotion because they are already trusted and can pass significant authority to other URLs via internal links.

Domain Authority vs. Domain Rating vs. Authority Score

When researching what is Domain Authority, you will inevitably encounter two competing metrics: Ahrefs’ Domain Rating (DR) and Semrush’s Authority Score (AS). All three aim to predict ranking potential, but they use different algorithms and data sources, which means the same website can have noticeably different scores across tools.

Because each provider has its own crawler and scoring model, you should avoid obsessing over the exact number from any single tool. Instead, look at trends over time within one tool, and use others as cross‑checks. Many experienced SEOs recommend a “tri‑metric” approach: track DA, DR, and Authority Score together and focus on whether you are gaining or losing relative to your competitors, not on whether you have hit some abstract target number.

How to Improve Your Domain Authority

With a clear understanding of what is Domain Authority and the factors behind it, you can take targeted action to raise your score. Remember that DA growth is logarithmic—early gains come relatively quickly, but progress slows as your score climbs. Most case studies from agencies and SEO platforms suggest that meaningful DA increases typically happen over months and years, not days or weeks.

Build High-Quality Backlinks

Since referring domains are the most heavily weighted factor, link building is the fastest lever you can pull. Focus on earning backlinks from sites with a higher DA than your own and that are topically relevant to your niche. A DA 30 link from a relevant industry publication often carries more ranking weight than a DA 80 link from a generic, unrelated website.

Effective strategies include:

• Guest posting on authoritative blogs and niche sites with real audiences.
• Creating original research, data studies, and whitepapers that others want to cite.
• Building relationships with journalists and industry influencers through services like HARO (Help a Reporter Out) and similar platforms.
• Producing link‑worthy assets such as infographics, calculators, and comprehensive “ultimate guides.”

Create Comprehensive, Link-Worthy Content

Content is the engine that attracts backlinks organically. Focus on producing in‑depth, well‑researched articles that provide genuine value to your target audience. Statistical roundups, definitive guides, original case studies, and expert interviews tend to earn the most natural links. Content marketing resources from Moz, Ahrefs, and other major SEO blogs consistently show that “10x content” (material that is significantly better than what currently ranks) is the most reliable way to attract links over the long term.

Build topical authority clusters by creating groups of interlinked pages that cover a single subject from every angle. For example, if you want to own the topic of “what is Domain Authority,” you might also publish related content on link building, authority metrics, and competitive analysis. This approach not only attracts more backlinks but also helps search engines understand your expertise.

Optimize Technical SEO

Poor technical health can silently undermine your DA growth. Ensure your site loads quickly (aiming to meet or exceed Google’s Core Web Vitals recommendations), is fully mobile‑responsive, and has a clean internal link architecture that distributes link equity efficiently across your pages.

• Fix broken internal links and redirect chains that waste crawl budget and authority.
• Use proper 301 redirects for any changed URLs rather than temporary 302s.
• Implement canonical tags to prevent duplicate content issues.
• Submit an accurate XML sitemap and monitor indexing in Google Search Console.

Technical SEO guides from Google Search Central and independent SEO blogs offer detailed checklists for maintaining a healthy site that can fully benefit from the backlinks you earn.

Audit and Reduce Toxic Backlinks

Spammy or low‑quality backlinks can drag your DA down by increasing your risk profile. Regularly audit your backlink profile using tools like Moz Link Explorer, Ahrefs, or Semrush. If you find links from obvious spam domains, link farms, or paid link networks, try to have them removed by contacting site owners. As a last resort, you can use Google’s Disavow Tool (carefully) to signal that you do not want certain links considered.

Moz’s documentation on Spam Score provides additional guidance on how they assess risky link patterns and why cleaning them up can help stabilize or improve your authority metrics over time.

Strengthen Your Internal Linking

Internal links distribute the authority earned by your strongest pages to the rest of your site. Every time you publish new content, link to it from relevant existing pages and link back from the new content to high‑priority URLs. Use descriptive, natural anchor text so that both users and search engines understand the relationship between your pages.

Many successful DA growth case studies highlight internal linking as a low‑cost, high‑impact tactic: by reorganizing content into clear hubs and spokes, sites were able to surface important pages more effectively and make better use of the external links they already had.

Maintain Content Freshness

Outdated content loses links over time as other sites stop referencing it or the information becomes irrelevant. Schedule regular content audits—quarterly is a good starting point—to update statistics, refresh examples, fix broken outbound links, and expand sections with new insights. Keeping your content current signals to both users and link prospects that your site is actively maintained and authoritative.

Tools to Measure and Track Domain Authority

Monitoring your DA over time is essential for evaluating whether your SEO strategy is working. Here are some of the most widely used tools, each with its own strengths:

• Moz Link Explorer: The definitive source for DA since Moz created the metric. Enter any URL to see DA, Page Authority, Spam Score, linking root domains, and total backlinks.
• Ahrefs Website Authority Checker: Provides Domain Rating (DR) and access to one of the largest backlink indexes, useful for competitor research and link gap analysis.
• Semrush Domain Overview: Offers Authority Score along with organic traffic, keyword rankings, and site audit data.
• Majestic: Uses Trust Flow and Citation Flow to evaluate link quality and quantity, making it a useful complement to DA when auditing backlink health.
• Google Search Console: While it does not provide a DA score, Search Console shows which sites link to you, how your pages perform in search, and where technical issues might be limiting your visibility. Use it alongside authority metrics to connect your DA trends with real organic performance.

For the most complete picture, check your DA at least once per month and track it alongside your organic traffic, keyword rankings, and referring domain count. Look for trends rather than reacting to single index updates, which can cause minor, temporary score shifts.

Domain Authority in Competitive Analysis

One of the most practical applications of understanding what is Domain Authority is using it to analyze your competitive landscape. Because DA is a comparative metric, its true value emerges when you measure your site against the sites you are trying to outrank.

Here is a simple process for using DA in competitive analysis:

1. Identify your primary keywords. List the 5–10 most important search terms for your business.
2. Check the top 10 results. For each keyword, record the DA of every domain on page one of Google using tools like MozBar or Link Explorer.
3. Calculate the competitor median. Find the median DA of those top‑10 results. This is the authority threshold you need to match or exceed.
4. Apply a buffer. Set a medium‑term target slightly above that median (for example, +5 to +10 points) for ranking stability.
5. Identify gaps. If your DA is significantly below the median, focus on link building and authority content. If you are at or above the median but still not ranking, look to on‑page, technical, or intent alignment issues instead.

This approach transforms DA from a vanity metric into an actionable diagnostic tool. It tells you whether your authority gap is the bottleneck or whether you need to prioritize other elements of your SEO strategy.

Limitations of Domain Authority

No discussion of what is Domain Authority would be complete without acknowledging its limitations. While DA is a valuable benchmark, it has well‑known drawbacks that every SEO professional should keep in mind:

• Not a Google ranking factor: Google does not use DA, DR, or Authority Score directly in its algorithms, even though these metrics correlate with real‑world performance.
• Proprietary and non‑transparent: Moz does not fully disclose the formula behind DA. While they share general information about the factors involved, the exact weighting and algorithmic details are proprietary.
• Can be manipulated: Despite the improvements in DA 2.0, the metric can still be inflated through private blog networks (PBNs) and other artificial link schemes. A high DA does not always mean a site is genuinely authoritative.
• Ignores content quality directly: DA is fundamentally a link‑based metric. A site with thin, low‑quality content can theoretically achieve a high DA if it has enough strong backlinks, while an excellent site with few backlinks may have a low DA.
• Industry‑specific variances: Comparing DA scores across different industries is misleading. Always benchmark within your own niche.
• Logarithmic scaling: Because DA is logarithmic, the effort required to move from 70 to 80 is far greater than the effort required to move from 10 to 20. Stakeholders who do not understand this may set unrealistic expectations.

The healthiest way to use DA is as one signal among many. Combine it with actual Google Search Console data, organic traffic trends, keyword rankings, engagement metrics, and conversions. If your DA is rising but your organic traffic is flat, something else in your strategy needs attention. If your organic traffic is growing even though your DA has not moved, you are doing things right in areas that DA does not capture directly.

DA Growth Timeline: What to Expect

Finally, understanding realistic timelines helps you set proper expectations. DA growth is a marathon, not a sprint, and the pace slows as your score rises. Many case studies shared by agencies and SEO platforms suggest that:

• New sites can often reach the DA 10–20 range within several months of consistent link and content work.
• Reaching DA 30–40 typically takes sustained link acquisition and content publishing over the course of a year or more.
• Breaking into DA 50+ usually requires a multi‑year, compound effort and coverage by higher‑authority sites, especially in competitive industries.

Each new referring domain tends to have a bigger impact when you are at the lower end of the scale, with diminishing returns as you climb. That is why patience and consistency are critical: you cannot “hack” your way to DA 70 overnight in a legitimate way. Instead, think of your work in terms of systems—regular link outreach, ongoing content creation, periodic technical audits—and let DA serve as an external scorecard for those systems.

By combining a deep understanding of what is Domain Authority with a disciplined, multi‑faceted SEO strategy—strong backlinks, comprehensive content, solid technical foundations, and realistic expectations—you give your website the best possible chance of climbing the SERPs and reaching the audience you want to serve.