Domain Authority
Domain Authority is a score from 1 to 100 made by Moz, an SEO software company, that predicts how likely a website is to rank in search results compared with other sites. Moz builds it mostly from the links pointing at a site and how many sites they come from. Moz says Google doesn't use it to rank pages.
Source: Moz, Domain Authority: What is it and how is it calculated (updated March 18, 2025), checked October 29, 2026
What Domain Authority means for your business
Moz calls Domain Authority relative. There's no good or bad number on its own, only how you compare with the sites you're up against. We'd use it that way, as a rough check next to a few competitors, and never as a goal. Your score can also move when Moz updates its own data, with nothing changing on your site.
Moz also makes Page Authority, the same kind of score for one page instead of a whole site. Site authority is a looser phrase for the general idea. Google's guide to its ranking systems says it looks at some things across a whole site as well as page by page, but it doesn't publish a score for them.
What we'd watch is the links behind the number: who points to you, and whether they're real places your buyers know and trust. If a competitor keeps showing up above you in Google and you can't see why, our SEO and AI search work compares the two sites link by link and page by page.
Last reviewed October 29, 2026. All terms
How AI answers it today
On October 29, 2026, Google's AI Overview credited the score to Moz, said Google doesn't use it, and cited Moz, SEO tool blogs, Reddit and YouTube. ChatGPT gave the same basics, linked only to Moz's checker, and added score bands it said weren't Moz's own.
Our run through ChatGPT and Google's AI Overview, October 29, 2026. A sample, not what every buyer sees.
Related terms in links and authority
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