Domain Authority

Domain Authority

Domain Authority (DA) is a search engine ranking score developed by Moz that predicts how likely a website is to rank in the search engine result pages (SERPs). DA values range from 1 to 100, with higher scores indicating a greater ability to rank organically.

How Domain Authority Is Calculated

Moz computes DA from a machine-learning model that evaluates dozens of signals tied to a domain's overall link profile. The two most influential inputs are the quantity and quality of backlinks pointing to the domain, alongside additional link metrics such as linking root domains, MozTrust and MozRank.

Because the algorithm is recalibrated periodically, scores can shift even when nothing changes on your own site. A drop of a few points often reflects a model update rather than a loss of authority.

Why Domain Authority Matters as a Comparative Metric

DA is best used as a comparative tool, not as an absolute benchmark. It is most useful when you want to weigh the link strength of two or more domains against each other — for example, when evaluating a guest post opportunity, screening a backlink prospect, or sizing up the competitive landscape for a target keyword.

Treating DA as a competitive signal works well for these tasks:

• Comparing the link equity of competing domains in the same niche
• Vetting a potential link source before outreach
• Tracking your own domain's authority trend over multiple months
• Prioritising backlink targets when budget is limited

DA Is Not a Google Ranking Factor

Domain Authority is a proprietary Moz metric and is not used by Google in its ranking algorithm. Google relies on its own internal signals, including PageRank and hundreds of additional factors. That said, DA correlates with the ability to rank because it is built on the same kind of link data that Google considers.

If you want a second opinion alongside DA, the most common alternative is Domain Rating (DR) from Ahrefs, which uses a similar 0–100 scale but a different calculation model.

The Logarithmic Scale: Why Higher DA Is Harder to Earn

DA uses a logarithmic scale, which means raising your score from 20 to 30 is significantly easier than moving from 70 to 80. The higher your DA, the more high-quality backlinks you need to gain even a single additional point.

Practical implications for SEO planning:

• Newer sites can post quick early gains with consistent link building
• Established sites need a steady flow of high-authority links to keep climbing
• Comparisons should always be made against direct competitors, not against giants like Wikipedia or major news outlets

How Often Moz Updates DA

Moz refreshes its index and recalculates DA on a regular cadence, so values can change based on algorithm updates or shifts in the wider web. Track your DA over time rather than reading too much into a single snapshot.

Limits of Domain Authority for SEO Strategy

While DA is a useful benchmarking tool, it should not be the only metric you focus on. High-quality content, user experience, technical SEO and topically relevant backlinks remain the most important drivers of long-term SEO success. A site with a moderate DA and strong topical relevance will often outrank a higher-DA site that lacks subject-matter depth.

Use Domain Authority as one input in a broader SEO dashboard alongside organic traffic, keyword rankings, conversions and engagement metrics.

Frequently Asked Questions

What is Domain Authority (DA) and how does it work?

Domain Authority (DA) is a search engine ranking score developed by Moz.

DA estimates how likely a website is to rank well in search engine results. The score runs from 1 to 100, with higher values signalling stronger ranking potential. Moz uses several factors to calculate it, including the quantity and quality of inbound links from other domains.

Check your DA regularly to inform and refine your SEO strategy.

How can I improve my website's Domain Authority (DA)?

Improving Domain Authority (DA) requires a strategic, long-term SEO approach.

Increase the number of high-quality backlinks, strengthen on-page SEO and publish relevant content on a consistent schedule. Because DA was developed by Moz, you can use their toolset to monitor your progress over time. A higher DA can boost your visibility in search engines and support more organic traffic.

Focus on sustainable SEO practices for durable, long-term results.

Why is Domain Authority (DA) important for SEO?

Domain Authority (DA) matters because it predicts a website's ability to rank in search engines.

A higher DA score can lead to better positions in search results, which translates into more organic traffic. Moz developed DA to give webmasters a metric for evaluating overall SEO performance. Sites with a high DA are also often perceived as more trustworthy by users and partners.

Concentrate on building authority steadily to improve your SEO outcomes.

How does Domain Authority (DA) differ from Page Authority (PA)?

Domain Authority (DA) and Page Authority (PA) are both Moz metrics but differ in scope.

DA evaluates the ranking strength of an entire domain, while PA focuses on the ranking ability of a single page. Both scores range from 1 to 100, with higher values indicating better ranking opportunities. DA is useful for assessing a website overall, whereas PA is the right lens for analysing specific URLs.

Use both metrics together to build well-rounded SEO strategies.

What issues can cause a low Domain Authority (DA)?

A low Domain Authority (DA) can be caused by several underlying issues.

Common problems include a small number of high-quality backlinks, weak on-page SEO and a shortage of topically relevant content. Because DA was developed by Moz, a low score often reflects underperforming SEO fundamentals. Sites with a low DA generally find it harder to rank well in search engine results.

Audit your SEO strategy to identify and fix the weakest spots first.

Last updated: 16. May 2026