No, domain authority is not a direct Google ranking factor in 2026. The DA score comes from Moz, a third party SEO tool, and Google never reads it. But the 2024 Google API leak revealed an internal siteAuthority signal, so Google does measure site level trust in its own way.
- Domain Authority is a Moz metric on a 1 to 100 scale, and Google does not use it in the algorithm.
- Google reps, including Gary Illyes and John Mueller, denied any domain authority metric for years.
- The 2024 API leak exposed a siteAuthority attribute inside Google’s internal documents.
- DA still correlates with rankings because it measures backlink strength, which Google does reward.
- Treat DA as a comparison tool, not a ranking goal you optimize for directly.
What Is Domain Authority and Who Created It?
Domain Authority is a prediction score built by Moz, an SEO software company. The score runs from 1 to 100 and predicts how likely a website is to rank. Moz built it as a comparison tool, not as a copy of Google’s algorithm. Google has no access to this number and no reason to use it.
How Is Domain Authority Calculated?
Moz calculates DA mainly from your backlink profile. The model counts linking root domains, total backlinks, and the strength of those linking sites.
The scale works on a logarithmic curve. Moving from DA 20 to DA 30 is easy. Moving from DA 70 to DA 80 takes years of strong link earning.
Are Domain Rating and Authority Score the Same Thing?
No, these are separate metrics from separate tools. Ahrefs calls its version Domain Rating. Semrush calls its version Authority Score. Moz calls its version Domain Authority.
All three measure backlink strength with different math and different scales. Google uses none of them. A DA 50 site can show a DR 60, and both numbers stay valid inside their own tools.
What Has Google Said About Domain Authority?
Google has denied using domain authority many times over the past decade. Gary Illyes stated in 2016 that Google holds no overall domain authority metric. John Mueller repeated this position in multiple office hours sessions. Google’s public line stayed the same for years: pages earn rankings one by one, not through a sitewide score.
Mueller also explained why these denials make sense. Third party scores update on their own schedules and use their own data. Google cannot rank the web based on numbers it does not control.
The 2024 API leak changed how I read those denials. Google was technically correct about the Moz score. The full story about sitewide signals was different.
Did the 2024 Google API Leak Prove Site Authority Exists?
Yes, the 2024 Google API leak exposed an internal attribute named siteAuthority. The leaked Content Warehouse documents listed over 14,000 ranking attributes, and siteAuthority sat inside the Compressed Quality Signals. This contradicted years of public denials. Google measures sitewide trust internally, even though it never confirmed the exact weight of this signal.
The leak revealed two related signals. A Homepage PageRank value helps new pages rank before they earn their own links. A host Age attribute suppresses brand new sites until they prove trust over time.
One key point keeps people confused. Google’s siteAuthority is not the Moz DA score. The internal version likely draws on link quality, user behavior, and brand demand, not on a public formula.
Why Does Domain Authority Correlate With Higher Rankings?
Domain Authority correlates with rankings because both depend on backlinks. Google rewards strong, relevant link profiles, and Moz measures those same link profiles. High DA sites rank better as a result, even though Google never looks at the DA number itself. Correlation comes from the shared input, not from the score.
DA works like a thermometer. The thermometer does not create the heat. It only reports it. Your link profile creates the ranking power, and DA reports its size.
This is also where DA breaks down in 2026. A high DA site with zero traffic and zero brand searches carries little real authority. Google’s internal signals catch these zombie domains, while the public DA score stays high.
Should I Still Track Domain Authority in 2026?
Yes, I still track Domain Authority in 2026, but only as a comparison tool. The score helps me size up competitors, judge link prospects, and report progress to clients. I never treat DA as a Google ranking goal. I use it next to traffic data, because a high DA with zero traffic means nothing.
What Is a Good Domain Authority Score?
A good DA score is one that matches or beats the sites ranking for your target keywords. There is no universal good number. DA 35 wins in a local niche. DA 35 loses in finance or health.
New domains start at DA 1. Most established small business sites sit between 20 and 40. Major publishers sit above 70.
How Do I Increase My Domain Authority?
Earn backlinks from relevant sites with real organic traffic. Build linkable assets like original data and free tools. Remove toxic links that drag your profile down.
DA rises as a side effect of this work. I never chase the score itself. I chase the links that move both DA and rankings together.
Does Site Authority Matter for AI Overviews in 2026?
Yes, site level authority shapes AI Overview citations in 2026. AI systems select sources that show strong trust signals, and sitewide authority is part of that picture. My high authority client sites earn AI citations far more often than new domains. The Moz score itself plays no role, but the trust behind it does.
Brand demand feeds this trust in 2026. Google’s systems reward domains that users search for by name. That navigational demand marks a site as a real entity, not just a collection of pages.
What Should You Do Next With Domain Authority?
Stop chasing the DA number and start building what the number measures. Audit your backlink profile this week, compare your score against the top three competitors in your SERPs, and target relevant sites with real traffic for new links. Google rewards genuine site trust in 2026, and DA will follow that trust on its own.
No, domain authority is a Moz metric and Google does not use it in the algorithm. Google measures site level trust through its own internal signals instead.
The 2024 leak exposed an internal siteAuthority attribute inside Google documents. This proved Google measures sitewide trust, even after years of public denials.
DA and rankings both depend on backlinks. Google rewards strong link profiles, and Moz measures those same profiles, so the two numbers move together.
A good score is one that matches or beats the sites ranking for your target keywords. Most established small business sites sit between 20 and 40.
Earn backlinks from relevant sites with real traffic, build linkable assets, and remove toxic links. DA rises as a side effect of quality link earning. Is domain authority a Google ranking factor?
What did the Google API leak reveal about site authority?
Why do high DA sites rank better on Google?
What is a good domain authority score in 2026?
How can I increase my domain authority?
