What is Domain Authority?
Domain Authority is a third-party search engine optimisation score that estimates how likely a website is to rank in search results compared with other websites. The score is calculated from link-related signals, including the number and quality of linking domains. Domain Authority is not a Google ranking factor and doesn't guarantee rankings.
Quick Facts About Domain Authority
Category
Third-party SEO metric
Measured by
Link authority and related signals
Used for
Comparing website ranking potential
Common confusion
It is not a Google ranking score
Also called
DA
Often discussed with
Competitor SEO Analysis, Link Building
Key Takeaways About Domain Authority
- Domain Authority estimates ranking potential by checking a website’s backlink profile.
- Google does not use Domain Authority as an official ranking factor.
- A high score cannot fix poor content, technical problems, or weak search intent.
- Scores are comparative, so compare results with relevant competing websites.
- Genuine, relevant backlinks usually matter more than many low-quality links.
Understanding Domain Authority
Domain Authority is a proprietary metric created by Moz. It estimates a website’s chance of ranking in search results. The score usually uses a logarithmic scale from 1 to 100. Higher scores show stronger estimated authority. It's best understood as a comparison tool. It isn't a direct measure of Google performance.
Related glossary terms: Organic Search, Search Engine Optimisation, E-E-A-T.
The score mainly reflects a website’s backlink profile. This includes links from other domains. It also includes the authority of those linking websites. Domain Authority doesn't measure every organic search factor. These include useful content, technical access, search intent, page experience, and local relevance. Google has also stated that it doesn't use Domain Authority as a ranking factor.
How Domain Authority Works, Is Measured, or Is Used?
Domain Authority is calculated by a third-party SEO platform. It uses a proprietary model. The model examines signals linked to referring domains, inbound links, and link quality. It then converts those signals into a comparison score. The formula is proprietary and may change. The same website can receive different scores from different SEO tools.
SEO professionals commonly use Domain Authority during competitor analysis. They also use it for backlink reviews and link-building planning. A practical workflow compares several websites in the same market. It identifies relevant sites with stronger link profiles. It also checks whether those links are trustworthy and suitable. The score should be considered alongside:
- Organic rankings and non-branded search visibility.
- Relevant referring domains and their editorial quality.
- Content coverage, technical SEO, and page-level performance.
- Traffic quality and conversions from organic search.
Why Domain Authority Matters?
Domain Authority can help teams assess a website’s link profile strength. A large difference between competing domains may show stronger links. One website may have earned more trusted references over time. This information can support prioritisation. However, it can't prove that a link will improve rankings.
The metric works best when teams check trends and comparisons regularly. A rising score may suggest that a website is gaining trusted links. A falling score may show lost links or scoring model changes. It may also show stronger competitors. It should never replace direct evidence. This includes Google Search Console impressions, clicks, rankings, and qualified leads.
When Domain Authority Matters Most?
Domain Authority matters most when websites assess close competitors. It also helps when planning a structured link-building programme. It can help identify realistic publication targets. It may reveal industries with strong link competition. It can provide a broad baseline before and after an SEO campaign. The analysis matters more when competitors serve similar audiences. They should also target similar queries.
The metric needs care when websites have different business models. Location and brand recognition can also differ. A local business may compete well with a lower score. It may have stronger relevance for a specific suburb or service. Before acting on the score, check the link source’s editorial standards. Check its topic relevance and traffic potential. Also check the risk of manipulation. Paying for artificial links can waste money. Irrelevant links can cause the same problem. These actions may conflict with search engine spam policies.
How to Evaluate Domain Authority?
- Compare the score with three to five direct search competitors rather than treating it as an absolute grade.
- Review the number, relevance, and editorial quality of referring domains.
- Check whether score changes coincide with gained or lost backlinks.
- Validate the metric against Google Search Console impressions, clicks, rankings, and conversions.
- Investigate sudden score increases for manipulative, irrelevant, or sitewide links.
Related Concepts Compared
Domain Authority vs. Page Authority
Page Authority estimates the ranking strength of one webpage, while Domain Authority estimates the comparative strength of an entire domain.
Domain Authority vs. Domain Rating
Domain Rating is Ahrefs’ proprietary backlink-based metric. Domain Authority is Moz’s metric, so the scores use different data, calculations, and scales.
Domain Authority vs. Google Ranking Factor
A Google ranking factor is a signal used by Google’s systems to order results. Domain Authority is an external estimate and is not an official Google ranking factor.
Domain Authority vs. Link Equity
Link equity describes the potential value passed through a hyperlink. Domain Authority summarises estimated domain-level strength using a third-party scoring model.
Expert Note
Treat Domain Authority as directional evidence, not a performance target in isolation. A relevant link from a smaller, trusted local publication may be more useful than a high-scoring domain with no topical connection or meaningful audience.
Common Mistakes or Myths About Domain Authority
- Treating Domain Authority as a score assigned or used directly by Google.
- Comparing scores from different SEO platforms as though they use one shared formula.
- Chasing a higher score through irrelevant, paid, or low-quality backlinks.
- Using Domain Authority without checking rankings, traffic, leads, and technical SEO.
- Assuming a high domain score guarantees strong performance for every page.
Domain Authority in Practice: A Real-World Example
A Brisbane physiotherapy website has a Domain Authority score of 28, while a competing site has a score of 42. This gap may show the competitor has stronger backlinks. The clinic should also compare local reach, service pages, content quality, rankings, and enquiries before changing its plan.
Sources & Further Reading on Domain Authority
Related Services
Related Terms
Organic Search
Organic Search is the unpaid visibility a website receives in search engine results through relevance, quality…
Search Engine Optimisation
Search Engine Optimisation is the process of improving a website’s visibility in unpaid search results by…
E-E-A-T
E-E-A-T is a framework used to assess Experience, Expertise, Authoritativeness and Trustworthiness in content and its…
Best SEO Agency Brisbane
Have Questions About Domain Authority?
Contact Best SEO Agency Brisbane for practical guidance on Domain Authority and related seo agency work in South Brisbane.