Domain Authority (DA) is a proprietary metric developed by Moz that scores a website’s authority on a scale of 0 to 100. Higher scores indicate a greater ability to rank in search engine results. DA is calculated using a machine learning algorithm that analyses a site’s backlink profile — the number and quality of links pointing to it from other websites.
How Domain Authority Is Calculated
Moz calculates Domain Authority using multiple factors from its link index:
- Linking root domains: The number of unique domains linking to your site
- Link quality: The authority of sites linking to you — a link from a high-DA site is worth more than many links from low-DA sites
- MozRank and MozTrust: Moz’s internal link quality signals
- Total links: The overall volume of inbound links
DA is calculated on a logarithmic scale — it is easier to improve DA from 20 to 30 than from 70 to 80. The score is relative and updates regularly as Moz’s index refreshes.
Domain Authority Score Benchmarks
| DA Score | Assessment | Typical sites |
|---|---|---|
| 1-10 | Very low | New sites, no backlinks yet |
| 11-25 | Low | Small blogs, local businesses |
| 26-40 | Below average | Established small sites |
| 41-50 | Average | Mid-size established sites |
| 51-60 | Good | Strong niche sites, regional news |
| 61-75 | Strong | Major industry publications |
| 76-100 | Excellent | Wikipedia, BBC, major platforms |
Domain Authority vs Page Authority vs Domain Rating
| Metric | Provider | Measures |
|---|---|---|
| Domain Authority (DA) | Moz | Whole domain authority — 0 to 100 |
| Page Authority (PA) | Moz | Individual page authority — 0 to 100 |
| Domain Rating (DR) | Ahrefs | Whole domain backlink strength — 0 to 100 |
| Authority Score | SEMrush | Domain authority composite score |
DA is the most widely recognised of these metrics. When SEOs and link builders refer to a site’s “authority”, they almost always mean Moz’s Domain Authority score — even when using other tools. DA has become the industry standard for quick site quality assessment.
How to Check Domain Authority
- Moz Link Explorer: Free at moz.com/link-explorer for up to 10 queries per month
- MozBar Chrome extension: Free — shows DA/PA for any site you visit
- Moz Pro: Full access from $99/month
- Third-party tools: Many SEO tools display Moz DA in their interfaces
How to Improve Domain Authority
- Build high-quality backlinks: Links from high-DA sites have the most impact. One link from a DA 70 site is worth more than 100 links from DA 10 sites.
- Create linkable content: Research, original data, comprehensive guides, and tools naturally attract backlinks
- Fix toxic links: Disavow spammy links that could be hurting your profile
- Internal linking: Strong internal link structure distributes authority across your pages
- Be patient: DA improvements take time — typically months not weeks
Frequently Asked Questions
What is a good Domain Authority score?
A DA above 50 is generally considered good. However, DA is relative — what matters more is your DA compared to competitors in your niche. A DA of 35 may be strong in a low-competition niche. Compare your DA to the sites currently ranking for your target keywords rather than aiming for an absolute number.
Does Domain Authority affect Google rankings?
Domain Authority is a Moz metric, not a Google metric. Google does not use DA in its ranking algorithm. However, DA correlates with ranking ability because it measures backlink quality — which does influence Google rankings. Sites with high DA typically have strong backlink profiles that genuinely help them rank.
How often does Domain Authority update?
Moz updates Domain Authority scores approximately monthly as it refreshes its link index. Significant changes in your backlink profile may take several weeks to be reflected in your DA score.
What is the difference between Domain Authority and Domain Rating?
Domain Authority (DA) is Moz’s metric. Domain Rating (DR) is Ahrefs’ equivalent metric. Both measure backlink strength on a 0-100 scale. DA is more widely used as an industry standard. DR is generally considered more granular. A site can have different DA and DR scores — the methodologies differ despite measuring similar concepts.
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Who Is Domain Authority Best For?
Domain Authority (DA) is particularly beneficial for webmasters, digital marketers, and business owners who are looking to enhance their online presence and improve their search engine rankings. It serves as a useful metric for assessing the strength of a website relative to competitors. For small businesses and startups, understanding DA can help prioritize SEO efforts and allocate resources effectively. Additionally, agencies that manage multiple client accounts can leverage DA scores to set benchmarks and track progress over time.
For content creators and bloggers, DA can be a guiding metric to determine which sites to collaborate with for guest posting or link building. Knowing the DA of potential partners allows them to focus on high-authority sites that can positively impact their own rankings. Lastly, SEO professionals use DA to inform their strategies, making it easier to identify areas for improvement and measure the success of their campaigns.
Key Things to Consider When Using Domain Authority
While Domain Authority is a valuable tool, there are several key factors to keep in mind when utilizing it for your SEO strategy. First, it’s important to remember that DA is a comparative metric, meaning that it should be used to assess your site’s performance against others rather than as an absolute score. A site with a DA of 30 may be doing well in a niche with lower competition, while a DA of 50 may struggle in a highly competitive space.
Another factor to consider is that DA is not a direct ranking factor used by search engines like Google. Instead, it is a predictive score, and while it can offer insights into potential performance, it should not be the sole focus of your SEO efforts. Always prioritize creating high-quality content, improving user experience, and building genuine backlinks over simply trying to increase your DA.
Finally, keep in mind that DA scores can fluctuate due to changes in the algorithm or the competitive landscape. Regularly monitoring your DA, along with other SEO metrics such as organic traffic and conversion rates, will provide a more comprehensive view of your site’s health and performance.
Final Verdict on Domain Authority
In conclusion, Domain Authority is an essential metric for anyone involved in SEO and digital marketing. It provides valuable insights into your website’s potential to rank in search engine results and serves as a benchmark for measuring your SEO efforts against competitors. However, it is crucial to approach DA as part of a broader SEO strategy, rather than a standalone goal.
By understanding who can benefit from DA and the key considerations involved in its use, you can make informed decisions that will enhance your website’s visibility and performance. Ultimately, focusing on quality content, effective link-building strategies, and a user-friendly experience will yield the best results in improving your website’s authority and search rankings.
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