Domain Authority vs Domain Rating: What Really Matters for SEO

What Is Domain Authority (Moz)?

Domain Authority, commonly referred to as DA, is a proprietary metric developed by Moz. It predicts how likely a website is to rank on search engine results pages (SERPs), expressed as a score from 1 to 100. The higher the score, the stronger the domain's perceived authority — at least according to Moz's model.

A brand new website starts somewhere around 1. Established giants like Wikipedia or Google sit at 90+. Most healthy, actively maintained websites fall somewhere in the 20–60 range, and where you land within that range depends heavily on your backlink profile, content volume, and the overall health of your site.

How DA Is Calculated

Moz calculates Domain Authority using a machine learning model that incorporates dozens of signals. The most significant factor is your backlink profile — specifically, the quantity and quality of unique domains linking to your site. But DA is not purely link-based. Moz also factors in elements like:

• The authority of the linking domains themselves (a link from the BBC matters more than a link from a brand-new blog)
• Spam score of linking domains
• Linking root domains versus total inbound links
• Internal link structure and site architecture signals
• Non-link signals such as MozRank and MozTrust components

Because of the machine learning foundation, DA is calculated relative to all other sites in Moz's index. This means your DA score can go down even if you're gaining links — simply because other websites in the index are growing faster than you. This relative nature is one of the most misunderstood aspects of the metric.

The DA 2.0 Update

In 2019, Moz rolled out a significant overhaul known as DA 2.0. The update introduced a more sophisticated spam detection model and a revised link graph that more closely mirrors what Moz believes Google evaluates. Many websites saw their DA scores drop substantially after this update — not because their link profiles had weakened, but because the algorithm had become more discerning about what counted as a quality link.

DA 2.0 also made the metric more volatile in the short term. Scores shift monthly as Moz recrawls the web, and a single large site either gaining or losing links to your domain can move the needle meaningfully. For SEO practitioners, this update was a useful reminder that DA is a snapshot, not a fixed measurement.

What Is Domain Rating (Ahrefs)?

Domain Rating, or DR, is Ahrefs' version of a domain-level authority metric. Like DA, it runs on a 1–100 scale. Unlike DA, it is almost entirely focused on one thing: the strength and quantity of unique referring domains pointing to your website.

Ahrefs is widely regarded as having one of the most comprehensive backlink indexes in the SEO industry, which gives DR a particular kind of credibility among link builders and technical SEOs. If you're evaluating a site purely from a link acquisition standpoint, DR tends to be the go-to number.

How DR Is Calculated

The DR calculation is straightforward in concept, even if the math underneath it is complex. Ahrefs looks at:

• The number of unique referring domains linking to a target site
• The DR score of each of those referring domains
• How many unique domains each of those referring sites links out to (so a site that links to 10 domains passes more authority per link than one that links to 10,000)

Crucially, Ahrefs uses a logarithmic scale. This means moving from DR 10 to DR 20 is significantly easier than moving from DR 70 to DR 80. The top end of the scale is extremely compressed — the difference in actual link equity between a DR 85 and a DR 90 site is enormous, even though the number gap looks small.

DR does not incorporate content signals, on-page factors, user behavior data, or anything outside of the backlink graph. Ahrefs is transparent about this. DR tells you about link strength, period.

DA vs DR: Key Differences

Both metrics serve the same general purpose — giving you a quick read on how authoritative a domain is — but they approach that goal differently. Understanding those differences is what separates SEOs who use these tools intelligently from those who chase numbers without context.

The key takeaway from this table is the last row. Neither DA nor DR is a Google metric. Google does not use either score. Google has its own proprietary PageRank algorithm (which is no longer publicly visible) and hundreds of other ranking signals that neither Moz nor Ahrefs has direct access to. Both DA and DR are third-party approximations — educated estimates based on publicly crawlable data.

Which One Should You Actually Use?

The honest answer is: it depends on what you're trying to do. But before getting into that, it's worth hammering home a point that gets lost in too many SEO conversations.

Neither DA nor DR should ever be treated as an absolute score. A DA 40 in the personal finance niche is not the same as a DA 40 in a low-competition local services niche. A DR 55 site with 200 high-quality referring domains is a very different beast from a DR 55 site built on thousands of spammy directory links. The number is a starting point for investigation, not a conclusion.

When DA Works Better

Domain Authority tends to be more useful when you're doing a broad assessment of a prospect's site health, especially if you're evaluating whether a domain is worth pursuing for editorial link placement. Because DA incorporates more signals beyond just links, it can sometimes surface red flags that a purely link-based metric would miss — for example, a site with a high number of spammy inbound links that artificially inflate its link count but drag down its DA due to Moz's spam detection.

DA is also the more commonly referenced metric in outreach conversations. If you're pitching link opportunities to clients who aren't deep in the SEO weeds, DA tends to be the number they've heard of.

When DR Works Better

If your focus is specifically on link building — whether that's prospecting, auditing your own profile, or benchmarking against competitors — DR is usually the more precise tool. Because Ahrefs' backlink index is widely considered more comprehensive than Moz's, and because DR is a clean, single-signal metric, it gives you a cleaner read on link strength without noise from other factors.

DR is also better for competitive analysis in link-heavy verticals. If you're trying to understand why a competitor is ranking above you and want to quantify the gap in link authority, DR gives you a more direct answer. It's the metric most professional link builders live in.

In practice, sophisticated SEO teams tend to track both. They use DR for link-specific work and DA as a secondary gut-check, particularly when onboarding new clients.

Common Mistakes When Using DA and DR

Chasing Scores Instead of Rankings

This is the big one. There are entire link building strategies built around acquiring links from high-DA or high-DR sites, with the implicit assumption that doing so will increase your own scores, which will then improve your rankings. This chain of reasoning has a fatal flaw: a higher DA or DR score does not directly cause better rankings. Rankings come from Google's algorithm. DA and DR come from Moz and Ahrefs. They are correlated with good rankings because strong sites tend to have both — but correlation is not causation.

You might land a link from a DA 70 site that contributes almost nothing to your actual rankings, while a more targeted link from a DA 35 site in your exact niche moves the needle significantly. The score on the tin is not the full story.

Comparing Scores Across Niches

A DA 50 in the legal industry, where authoritative publications are notoriously difficult to earn links from, represents a very different level of achievement than a DA 50 in a niche where high-volume guest posting has inflated scores across the board. Always anchor your DA and DR comparisons to the competitive landscape you're actually operating in. Who are your top 5 SERP competitors for your target keywords? What's their DA and DR range? That's the benchmark that matters.

Ignoring Context Behind the Score

A high DA or DR score tells you a site has a strong backlink profile according to the tool's model. It does not tell you whether that profile was built naturally or manufactured through PBNs, link farms, or aggressive outreach to low-quality publishers. It does not tell you whether the site's traffic is real or inflated by bot activity. Before you use any domain's score as the basis for a decision, dig one layer deeper. Look at the referring domain list. Check the traffic trend. Read some of the actual content.

Treating Score Drops as Emergencies

Clients panic when their DA drops. A 3–5 point DA drop with stable rankings and traffic is not a crisis — it's statistical noise. Train your clients to track the metrics that actually reflect business outcomes, and you'll spend a lot less time firefighting over dashboard numbers.

How to Improve Your Domain Authority and Domain Rating

Let's be direct: there is no clever hack for meaningfully improving DA or DR. The variables that genuinely move these scores are:

Quality Backlinks from Relevant, Authoritative Sites

This is the primary lever for both metrics. Earning links from sites that already have strong DA or DR scores, particularly sites that are topically relevant to your niche, is the most direct path to improving your own scores. Digital PR, original research, data-driven content, and genuine relationship-based outreach are the methods that produce this kind of link at scale. There are no shortcuts that hold up over a 12-month time horizon.

Content That Earns Links Naturally

The best link building is the kind that happens without a formal outreach campaign. Publishing content that is genuinely more useful, more comprehensive, or more data-rich than what currently ranks creates a compounding asset. Other sites cite it. Journalists reference it. People share it. Each of those touchpoints is a potential link that improves your DR and DA without additional effort per link earned.

Time and Consistency

Both metrics respond to sustained effort over time. A domain that has been consistently earning quality links for three years will have a fundamentally different profile than one that ran an aggressive campaign for six months and then went quiet. There is no substitute for playing the long game.

What Really Matters: Rankings, Traffic, Revenue

Here is the perspective shift that separates agencies doing genuinely good SEO work from those spinning their wheels on metric optimization: DA and DR are proxies. They are useful proxies. They correlate with real outcomes. But they are not the outcomes themselves.

The outcomes that matter to your clients are:

1. Rankings for commercially relevant keywords — the ones their customers actually type when they're ready to buy
2. Organic traffic from those rankings — real humans arriving at the site with genuine intent
3. Revenue or leads generated from that traffic — the business result that pays your retainer

A client with a DR of 25 competing against established players with DR scores in the 50–70 range faces a meaningful authority gap that needs to be addressed through link acquisition. Knowing that gap helps you set realistic timelines and build the right strategy. That's the legitimate use of these metrics.

Run a SERP analysis for your primary target keywords. Pull the DA and DR of the top 10 ranking pages' root domains. If the average DR in those results is 55 and your client is at 30, you have a 25-point DR gap to close over 12–18 months through sustained link acquisition. That is a strategy. That is what these metrics are for.

Platforms like PitchLinks.io are built with this reality in mind — helping agencies manage prospecting and outreach at scale while keeping the focus on the quality signals that actually predict link value, not just headline metrics.

Domain Authority and Domain Rating are valuable tools when used correctly. But they are tools, not outcomes. Build strong links. Create content that earns authority. Track rankings, traffic, and revenue. Let DA and DR be the diagnostic layer that informs those efforts, not the trophy case you're trying to fill.