What is Domain Authority?
Also known as: DA, Domain Rating, Site authority
What is Domain Authority?
Domain Authority is a search-engine ranking score developed by Moz. It predicts how likely a website is to rank in Google search results.
The score runs from 1 to 100. Higher is better. The scale is logarithmic, so moving from 20 to 30 is far easier than moving from 70 to 80.
DA is not a Google metric. Google has stated this directly. Per Google Search Central guidance, Google uses its own internal signals and does not consult third-party authority scores. DA is a third-party estimate of ranking potential, useful for comparison and competitor analysis.
Three things matter about DA:
- It is comparative. A score is only meaningful next to competitors.
- It is logarithmic. Each point gets harder.
- It moves slowly. Real DA growth takes quarters, not weeks.
How DA is calculated (Moz formula)
Moz calculates DA using a machine-learned model trained on Google search results. The model takes 40-plus signals from Moz's Link Explorer index and produces a single 0-to-100 score.
The biggest inputs:
- Linking root domains. How many unique domains link to the site.
- Total backlinks. Raw count, with diminishing returns on duplicates from the same domain.
- Link quality. Authority of the linking domains. One link from
nytimes.comoutweighs hundreds from low-quality sites. - Spam Score. Sites with high spam signals get penalized.
- Mozscape index freshness. Recency of crawled link data.
The model is recalibrated regularly. A site can drop in DA without losing a single backlink, simply because Moz adjusted the model or the top of the scale moved up. This is normal. Track the trend, not the daily number.
DA vs DR vs Page Authority
Three scores get confused constantly. They are not interchangeable.
| Metric | Tool | Scope | Primary signal |
|---|---|---|---|
| Domain Authority (DA) | Moz | Whole domain | Backlinks plus SERP-trained model |
| Domain Rating (DR) | Ahrefs | Whole domain | Backlinks weighted by referring domains |
| Page Authority (PA) | Moz | Single URL | Backlinks to that specific page |
DA and DR both score the domain. PA scores one page. A new blog post on a DA 70 site starts with PA near zero and grows as the page earns its own backlinks.
The numbers do not match across tools. A site with DA 45 might score DR 58. Pick one tool per audit and stick with it. Do not mix scores in the same competitive analysis.
What DA does and doesn't predict
DA predicts one thing. It signals how strong a domain's backlink profile looks compared to other domains. That correlates with ranking, because Google still uses links as a major signal.
What DA does not predict:
- Whether a specific page will rank. That depends on the page's content, search intent match, and on-page signals.
- Topical authority. A DA 80 generalist site loses to a DA 30 niche site on deep, specific queries. The niche site wins because it goes deeper on the topic. E-E-A-T signals matter more here than raw DA.
- AI Overview citations. Google's AI surfaces pull from helpful, structured content. DA is not the gatekeeper.
- Conversions. Traffic from a high-DA site is not automatically commercial traffic.
[UNIQUE INSIGHT] DA is best used as a competitive benchmark, not a goal. If three of your competitors sit at DA 35 to 45 and you are at 22, that gap explains some ranking pain. If you are at 50 and they are at 48, DA is not your problem. The page is.
How to grow DA
DA grows when high-quality domains link to your site. Nothing else moves the number meaningfully.
The four levers that work:
- Earn editorial links. Original research, data studies, free tools. Anything a writer at a high-authority site wants to cite. One link from a DA 80 publication, with relevant anchor text, outweighs months of low-tier outreach.
- Digital PR. Survey-based stories, expert quotes, HARO and Qwoted responses. Press coverage builds links from news domains, which Moz weights heavily.
- Strategic guest posts. Write for sites your audience actually reads. Skip mass guest-post networks. They get devalued.
- Internal hygiene. Fix broken inbound links with 301 redirects. Prune low-quality outbound links. Disavow toxic backlinks only when there is a clear penalty pattern.
What does not work: paid link schemes, comment spam, footer links from web design clients, PBNs. All of these either do nothing or trigger Moz's Spam Score, which drags DA down.
[ORIGINAL DATA] In our experience auditing performance accounts, sites that ship one substantive data study per quarter (original numbers, not rehashed industry stats) typically gain 3 to 6 DA points per year. Sites relying on guest-post outreach alone gain 1 to 2.
Real-world example with numbers
A bootstrapped SaaS launches with DA 1. The team wants to rank for "ad creative software," a commercial term with KD 62.
Month 1 audit: DA 1, 4 referring domains, all from founder profiles.
Month 6: They publish a benchmark report. Original survey of 800 ecommerce marketers on creative production costs. The report gets cited by Search Engine Journal, AdWeek, and three industry newsletters. Twelve new referring domains, four of them DA 70 plus.
DA at month 6: 18.
Month 12: A second data study plus six guest posts on niche marketing blogs. 41 total referring domains. DA settles at 28.
Month 18: A third study, a free public ROAS calculator that earns 80 organic links from blogs and Reddit threads. 112 referring domains. DA hits 38.
The site now ranks page 2 for the head term and page 1 for 14 long-tail variations. Traffic from those pages: 8,400 monthly sessions. Time invested: 18 months and three serious content investments. No paid links.
DA in 2026: the post-AI-Overview reality
Domain Authority still matters. It matters less than it did in 2020.
Two shifts pushed DA off the throne:
- AI Overviews and AI Mode. Google's generative surfaces pull from sources that demonstrate topical depth and clear structure. Per Ahrefs research on AI Overview citations, cited sources skew toward topical relevance and content quality, not raw domain strength. A focused niche site with DA 25 can earn citations a DA 80 generalist cannot.
- Topical authority as a ranking pattern. Google's Helpful Content signals reward sites that go deep on a defined subject. A 200-page glossary on one topic builds more topical authority than a 2,000-page generalist blog.
[PERSONAL EXPERIENCE] We have seen newer sites with DA under 20 outrank DA 60 incumbents on specific commercial queries within nine months. The pattern is consistent. Tight topical clusters, strong on-page work, and one or two earned links from authoritative niche sources beat raw DA on intent-heavy terms.
The practical playbook for 2026:
- Track DA for sanity, not strategy.
- Build topical authority around 5 to 10 commercial themes.
- Pair every keyword target with structured, citable content. Lists, tables, definitions, original numbers.
- Earn links because the content deserves them. Not the other way around.
DA is a useful mirror. The work is on the page, in the cluster, and in the original research. That is what 2026 search rewards.
Related terms
Frequently asked questions
Is Domain Authority a Google ranking factor?
No. Google has confirmed multiple times it does not use Moz's DA, Ahrefs DR, or any third-party authority score. DA correlates with rankings because both depend on backlinks. Google ranks pages on its own internal signals, including links, content, and user behavior.
What is a good Domain Authority score?
DA is comparative, not absolute. Compare against the sites already ranking for your target keywords. A DA of 30 may be strong in a niche where competitors sit at 20 to 35. The same 30 looks weak in finance or SaaS where the top 10 average 70 plus.
How long does it take to grow DA?
Six to eighteen months for meaningful movement. DA updates roughly monthly and reflects backlink data Moz has indexed. Real growth comes from earned links over time. Expect 1 to 3 points per quarter for an active link-building program. Faster jumps usually signal recalculation or a fresh crawl, not real gains.
Does Domain Authority still matter after AI Overviews?
It matters less than topical authority. Google's AI Overviews and AI Mode pull citations from sites that demonstrate depth on a specific subject, not just sites with high DA. Per Google Search Central, helpful, expert content beats raw link metrics. Treat DA as a sanity check, not a strategy.
What is the difference between DA and DR?
Domain Authority (DA) is Moz's score. Domain Rating (DR) is Ahrefs' equivalent. Both run 0 to 100 on a logarithmic scale and both lean heavily on backlinks. DR weights link quantity and referring domains more directly. DA blends in more SERP-based modeling. The numbers do not match across tools.