What Is Domain Authority, and Does It Matter?

You asked someone to look at your website, and they came back with a number. Your “domain authority” is 8. A competitor’s is 34. It was presented like a credit score, and you’re not sure whether to be worried.

The number is useful, but only if you understand what it measures and what it doesn’t. And the first thing to know is that Google doesn’t use it.

So what is domain authority?

Domain Authority is a score created by Moz, an SEO software company. It estimates how likely a website is to rank in Google, on a scale of 1 to 100, based mostly on the links pointing to that site from other websites.

Other tools have their own versions. Ahrefs calls its score Domain Rating. Open PageRank, a free tool, scores sites from 0 to 10. They’re calculated differently, but they’re all trying to estimate the same thing: how much the rest of the web trusts a site.

The term is now used loosely to mean that general idea, regardless of which tool produced the number.

If Google doesn’t use it, why does it matter?

Because it’s measuring something Google does care about.

Google has long used links as one way of judging a page. A link from one website to another works something like a recommendation. When many reputable sites link to yours, it suggests your site is worth sending people to. Google’s own Business Profile help page says that for local results, “prominence” includes “how many websites link to your business.”

Domain authority scores are third-party estimates of that signal. They’re not Google’s numbers, but they’re often a reasonable rough guide to how established a site is compared with its competitors.

Why do some links count more than others?

Think about recommendations in real life. If a friend says a contractor is good, that helps. If the local home builders association lists them as a member, or a local news outlet features their work, that carries more weight because the source has its own reputation.

Links work similarly. A link from a well-known, relevant site generally counts for more than a link from an obscure directory. A link from a related local source, like your chamber of commerce or a supplier’s dealer page, is often more useful to a local business than a link from a random site in another country.

That’s why buying large batches of cheap links tends to be a waste of money at best. Google’s spam policies specifically target link schemes.

What does a low score mean for your business?

Usually, just that your site is young or that few other sites link to it yet. That’s normal for most small businesses.

It does affect what you can rank for in the short term. A site with low authority will find it hard to outrank national publishers for broad, competitive searches. But it can still rank for specific questions where the competition is weaker, especially local ones. Many of the searches your customers make, like “how often should I service my heat pump in South Carolina,” aren’t contested by high-authority sites at all.

It also affects timing. Newer, lower-authority sites generally take longer to climb. Our guide on how long SEO takes to work explains why.

How do you build it?

There are no shortcuts that hold up, but there are reliable paths.

Publish things worth linking to. A genuinely useful local guide gets linked to by people who want to share it. Generic articles rarely do.

Use your local relationships. Chambers of commerce, trade associations, sponsorships, suppliers, community events and local media are natural sources of links for a local business. Many owners already have these relationships and simply haven’t asked for a link.

Link your own pages together. Internal links don’t raise your domain score, but they help pass trust from your stronger pages to newer ones. The hub-and-spoke model does this deliberately.

Be patient. Authority builds over months and years, which is part of why starting early matters.

Can a site with low authority outrank a stronger one?

It happens all the time on specific searches. A page from a lower-authority site can outrank a stronger site when it answers the question more directly, more completely or more locally. Authority raises a page’s ceiling, but relevance and quality still decide most head-to-head matchups between pages.

Should you track it?

It’s worth checking a few times a year as a rough measure of progress, especially compared with your direct competitors. But don’t treat it as the goal. Traffic from Google, rankings for the searches you care about and calls from new customers are what matter.

Domain authority is one piece of a bigger local picture, which our guide to local SEO for small businesses lays out step by step.

Domain authority isn’t a grade Google gives your business. It’s an estimate of how much of the web vouches for you, and that’s something you can build. If you’d like useful articles that give people a reason to link to you, I’m a Greenville copywriter, and you can book a 15-minute call.