A high domain authority score can look like proof your website is winning in search. But it’s a third-party estimate, not a Google ranking factor, and chasing it alone can pull your focus away from the work that brings you visibility and enquiries.

It’s understandable to use the score as a quick way to compare websites. Domain Authority (DA), created by Moz, estimates a site’s ability to rank based largely on its links. It doesn’t measure your actual Google rankings or guarantee future results.

This guide explains what DA can tell you, where its limits are, and how to use it to make smarter search engine optimisation (SEO) decisions. You’ll also see why a DA of 50 isn’t directly comparable with an Ahrefs Domain Rating of 50: each tool uses its own data and calculation.

For an Australian small business, the useful question isn’t simply “How do I raise my score?” It’s whether your website is earning relevant links, appearing for the searches that matter, and generating enquiries. At PurpleCow Digital, we put authority metrics in context alongside search visibility and business outcomes, so you can focus on progress that counts.

What Is Domain Authority, and What Does the Score Tell You?

Domain Authority (DA) is Moz’s metric for comparing the relative strength of websites. It’s a third-party score, not a rating assigned by Google. Moz reports it on a 1-100 scale, but a higher score doesn’t prove that a website ranks well, attracts enquiries or offers better information.

Think of DA as a comparison aid, not a business report card. It can help you assess how your website’s link profile compares with other sites, but it can’t tell you whether your pages answer customers’ questions or turn visits into sales. Measure those outcomes separately.

For a concise overview of the term, see What is Domain Authority?. The key distinction is that Moz created DA as an estimate for comparing websites. It isn’t a score Google publishes about your site.

For a beginner-friendly explanation of how the metric works, watch this video:

What does Domain Authority measure?

Moz calculates DA using its own methodology and link index. At a high level, the score reflects signals related to a website’s backlink profile, meaning links from other websites pointing to it. The score is intended to help compare sites, rather than provide a complete assessment of their SEO or business performance.

That distinction matters because a score leaves out context. A link from a relevant, respected industry publication may be more useful to your business than a link from an unrelated website, even if a simple count makes both look equal. The DA number alone doesn’t explain which links contribute to the comparison or whether a site serves its audience well.

For example, an Australian plumbing business could compare its DA with other plumbing businesses competing for similar services and customers. Comparing it with a national retailer would be less useful because the websites serve different audiences and operate in different markets. Keep the comparison close to your actual competitors.

Is Domain Authority a Google ranking factor?

No. Google does not use Moz DA as its ranking score. Google’s ranking systems are separate from Moz’s calculation. A change in DA doesn’t directly make your pages rise or fall in Google Search.

Websites with stronger, relevant backlinks may also perform well in search, so DA can move in the same direction as visibility. But that relationship doesn’t prove DA caused the rankings. Both may reflect link-related signals, while search visibility can also depend on factors the score doesn’t capture.

A third-party SEO metric describes a tool’s estimate; it doesn’t reveal Google’s own assessment or promise a ranking. Use DA to frame a competitor comparison, then check actual search visibility, relevant visits and enquiries to understand what’s happening for your business.

How Domain Authority Works: Links, Comparisons, and Limits

Backlinks help explain why authority scores exist, but a link total on its own tells you very little. Moz’s Domain Authority and Ahrefs’ Domain Rating are separate estimates built from link data, and neither is a direct measure of your website’s complete search performance.

Moz explains the purpose and limits of its metric in How Moz Calculates Domain Authority. For your own analysis, look beyond the headline score: note which websites link to you, how those links relate to your business, and whether your link profile supports the pages you want customers to find.

Why backlinks influence authority metrics

A referring domain is a distinct website linking to yours. If one industry publication links to your website from several articles, that’s multiple links but still one referring domain. This is why link analysis often considers both the number of linking websites and the quality of those links, rather than treating every link as an equal vote.

Context matters. A link from a relevant Australian trade association, supplier or industry publication may be more meaningful to your business than a link from an unrelated site. An editorial link, included because your content genuinely supports an article, also has a clearer reason to exist than a link placed solely to influence a metric.

Don’t mistake volume for value. A large quantity of low-value links isn’t a reliable sign of a healthy link profile, and pursuing links just to increase a count can distract from more useful opportunities. Review the sites linking to you, their connection to your field, and the pages they point to. Treat any authority-score movement as an observation, not proof that a particular link caused a change.

Why scores vary between SEO tools

Moz calculates Domain Authority using its own index and methodology. Ahrefs calculates Domain Rating using Ahrefs’ own link data and approach. Each provider has its own view of the web, so the links it finds and the way it weighs them can differ. The two scores are therefore not directly interchangeable, even though both use a 0-100 scale.

For example, Moz might show one DA figure for a plumbing business while Ahrefs reports a different DR figure for the same domain. That difference doesn’t automatically mean either tool is wrong. Each is reporting its own estimate using its own data and scoring model, not a shared industry scale.

For a meaningful trend, track the same provider’s score consistently and compare like with like: Moz DA against Moz DA, or Ahrefs DR against Ahrefs DR. Record the date and tool used, then assess changes alongside the referring domains and search outcomes you care about. Switching providers mid-comparison can make a change in measurement look like a change in performance.

No third-party authority score guarantees a search position. Use link metrics to guide investigation, not as a target that stands in for search visibility or business results. If you want a clearer view of how link-building fits into your wider SEO priorities, we can talk through your SEO approach.

How to Compare Domain Authority Without Chasing the Wrong Number

A score only becomes useful when you know what it measures and what you’re comparing it with. Moz’s Domain Authority, Ahrefs’ Domain Rating and Moz’s Page Authority each describe a different view of website or page strength. Treating them as one shared scale can lead you to the wrong conclusions.

Compare like with like, then inspect the evidence behind each score. Here’s the practical distinction:

Domain Authority vs Domain Rating vs Page Authority

Use the metric’s full name and provider when you report it. Moz DA is a Moz estimate for comparing whole websites; Ahrefs DR is Ahrefs’ separate estimate of a website’s backlink profile. Neither is a universal industry score, and their values shouldn’t be compared directly just because both are numbers.

Moz Page Authority focuses on an individual page, not the whole domain. That makes it more relevant when you’re assessing a specific service page or article against comparable pages. A site’s DA and one page’s PA answer different questions, so keep the metric and scope consistent in your notes.

What makes a useful competitor comparison?

Start with businesses targeting the same type of customer, services and search topics. For an Australian electrician, compare other electrical businesses competing for similar services, rather than a national retailer or a business in an unrelated industry. Familiarity or brand size alone doesn’t make a business a useful benchmark.

Then check the evidence behind the numbers. Look at whether referring websites are relevant to the industry, which pages earn links, and how comparable pages appear for the searches you care about. A difference in Moz DA or Ahrefs DR may prompt a closer look, but it doesn’t explain why one page is more visible.

• Compare the same metric from the same provider across the businesses you assess.
• Check the pages ranking for your target searches, not just the competitors’ homepages.
• Track rankings separately from qualified enquiries and conversions, which show whether search visibility is reaching potential customers and contributing to business results.

For example, if a competitor’s service page appears above yours, compare the pages’ relevance, usefulness and link support before assuming the domain-level score explains the gap. The goal isn’t to win a number comparison; it’s to find a practical SEO priority.

How to Improve Your Website’s Authority Signals Responsibly

A higher score shouldn’t be the goal of your SEO work. Focus on earning relevant recognition and making your website more useful to customers. The score may change as a result, but no responsible strategy can promise a particular increase or timeline.

Use this sequence to turn link data into practical next steps:

• 1. Review your current links. Note the referring domains, the pages they link to, and how relevant each site is to your business. Look for patterns that warrant a closer review, but don’t treat an unfamiliar or low-quality-looking link as automatic grounds for removal.
• 2. Set priorities. Identify gaps that matter to your audience and business goals. If relevant industry organisations or publications haven’t cited a useful resource you already have, that may be a better opportunity to explore than trying to increase the raw number of links.
• 3. Publish useful content. Create original resources that answer customer questions, explain a service or offer practical information another relevant website could cite. Give people a clear reason to link to your content, rather than producing pages solely to attract links.
• 4. Monitor outcomes. Track links and your chosen metric consistently, but also watch search visibility, qualified enquiries and conversions. Those measures help you judge whether your work is supporting real business goals.

Start with a useful backlink review

Check who links to your website, whether those sites make sense for your industry, and which pages receive links. A relevant link to a detailed service guide may offer more useful context than several links from unrelated sites. These patterns can help you decide what to investigate, but they don’t tell the whole story on their own.

Be measured before taking action. Don’t recommend removing links or using Google’s disavow tool based on a third-party score or a quick scan. Those decisions need case-specific evidence and a clear understanding of the links involved. Start with a careful review.

Build authority through valuable SEO work

Useful content is only part of the picture. Link-building works best as part of broader search engine optimisation (SEO), alongside on-page improvements that help pages answer searchers’ needs and technical work that helps search engines access and understand your website.

For example, a trades business might improve a service page that clearly explains what the service covers, then create a practical guide that suppliers or industry publications could reference. The aim is relevance and usefulness, not a guaranteed score change. Our SEO work brings link-building together with on-page and technical activity, with reporting focused on measurable outcomes.

Keep the score in its place: use it as one signal, while prioritising relevant links, search visibility and enquiries. That keeps your SEO plan focused on work that can support your business, not a number you can’t control directly.

Turn Domain Authority Insights into a Practical SEO Plan

A score becomes useful when it helps you choose a next step. For an Australian small-to-medium business, connect what you notice in your reporting to customer needs, business priorities and the time your team has available.

Keep the metric alongside search visibility, relevant website traffic, qualified enquiries and sales. Each shows a different part of the picture. Together, they can help you decide whether a change deserves attention or is simply a fluctuation to monitor.

Choose SEO priorities based on evidence

Turn a finding into a task with an owner and a clear purpose. If a service page attracts visitors who don’t enquire, review whether its content answers their questions and makes the next step clear. If a technical issue is affecting important pages, put that fix ahead of work with less immediate impact.

Separate focused fixes from ongoing work, then record what you expect each task to support. Clear reporting should show what was completed, what changed and what remains uncertain. That gives you a basis for deciding what to do next, rather than reacting to every movement in a score.

When an SEO partnership can help

When several priorities compete for attention, a strategic partner can help keep the plan focused on your goals and capacity. We use clear reporting to connect SEO activity with outcomes, so you can see what’s progressing and where further investigation may be useful.

If you’re assessing support, consider whether the proposed scope matches your priorities and gives you a practical way to review progress. Our SEO services and SEO packages guide can help you explore the kind of support and scope that may fit your needs.

Make the next decision based on evidence, not pressure to improve a single number. A focused plan gives you a clearer way to invest your time and assess the work’s contribution to your business.

Make Your Next SEO Move Count

Give your next SEO task a clear starting point: identify one moment when a potential customer might hesitate, feel unsure or leave your website without taking action. That could be unclear service information, a confusing next step or a question your page hasn’t answered.

Then choose a practical improvement and decide how you’ll tell whether it helped. Keeping the task specific makes it easier to fit around the demands of running a business, and easier to build on when you review what happened.

You don’t need to overhaul everything at once. Start with the part of the customer journey that matters most to your business, then keep refining it as you learn more about what your audience needs. We can help you shape those priorities into a clear next step.

Your next move doesn’t need to be complicated. Make it purposeful, keep moving, and give your business the chance to stand out.

Frequently Asked Questions

What is Domain Authority?

Domain Authority (DA) is Moz’s proprietary metric for comparing the relative strength of websites. Moz calculates it using its own data and methodology, so it isn’t a universal score shared by every search engine optimisation tool. Use it as one comparison signal, not a verdict on your website. For example, when reviewing a potential industry partner, check whether its site has relevant links and search visibility as well as a DA score.

What is a good Domain Authority score for a small business?

There’s no single score that makes a small business website good or successful. Compare your score with similar businesses competing for the same customers and search topics, using the same provider for each comparison. A lower figure alone doesn’t mean your search engine optimisation is failing. For a practical check, list a few close competitors and compare their relevant search visibility, useful links and qualified enquiries alongside the metric.

How is Domain Authority different from Domain Rating?

Domain Authority is Moz’s metric, while Domain Rating (DR) is Ahrefs’ metric. Moz and Ahrefs use different data and calculation methods, so their scores aren’t interchangeable or directly comparable as though they shared one scale. If Moz reports one figure and Ahrefs another for your website, record each with its provider. Then compare your website with similar sites inside that same tool and inspect the link information it shows.

Can Domain Authority decrease even when my website is improving?

Yes, a third-party score can fall while your website improves. The provider may update its data or calculations, or other websites’ link profiles may change and shift the comparison. Separate score movement from progress on your own site. For example, note whether a new service page is attracting relevant visits or enquiries, even if the score dips. Review the same provider’s metric over time before making a strategy change.

How can I improve Domain Authority safely?

Focus on making your website more useful and credible, rather than trying to manufacture a higher score. Publish original content that answers real customer questions, improve pages that explain your services, and seek relevant editorial links from sites that have a genuine reason to cite you. Avoid buying or manipulating links. There’s no ethical method that can promise a particular DA increase or ranking outcome, so assess your search and business results too.

How much does Domain Authority affect rankings?

Domain Authority itself doesn’t directly affect Google rankings because it’s a third-party metric, not part of Google’s scoring system. Links and other search signals can be relevant to search visibility, but the DA figure doesn’t show exactly how Google evaluates your pages. To understand whether your SEO work is helping, review page rankings for the searches that matter, relevant visits and the actions visitors take, such as making an enquiry or completing a purchase.

Should I track Domain Authority every month?

You can monitor Domain Authority periodically if it helps you understand broad changes or compare your site with relevant competitors. The useful frequency is one that supports decisions, not constant score-checking. Stick with the same provider for a consistent view, then pair its metric with measures such as search visibility, qualified enquiries and conversions. If a score moves but those measures don’t, investigate the link data before deciding whether your priorities need to change.

Article by

Angie Neal

Angie Neal is the founder and CEO of PurpleCow Digital, a full-service digital marketing agency based on Queensland's Redcliffe Peninsula. With deep expertise in SEO and web design,  as well as a certification as a GoHighLevel Admin. Angie helps small-to-medium businesses build scalable growth systems through AI-powered automations, CRM workflows, and smart digital strategy. She's also passionate about building a community of like-minded agency owners at the After Party — sharing insights, solving real problems, and helping others grow. Whether it's search visibility, lead management, or end-to-end automation — Angie's focus is always on helping businesses scale sustainably.