Domain Metrics Explained: DA, DR, Trust Flow, and What They Mean

Every SEO tool has its own set of numbers. MOZ has Domain Authority. Ahrefs has Domain Rating. Majestic has Trust Flow and Citation Flow. If you've ever compared your scores across platforms and wondered why they don't match, you're not alone.

This guide breaks down the major domain metrics, explains how each one is calculated, and shows you how to interpret them together for a clearer picture of your site's authority.

What Are Domain Metrics?

Domain metrics are third-party scores that estimate a website's authority and trustworthiness based on its backlink profile. They are not Google ranking factors—Google has confirmed it doesn't use any third-party authority score in its algorithm. However, they are useful proxies for understanding how your backlink profile compares to competitors.

Think of domain metrics like credit scores for websites. No single score tells the whole story, but together they give you a reliable estimate of your site's standing.

MOZ Metrics

Domain Authority (DA)

MOZ's Domain Authority is a score from 1 to 100 that predicts how likely a domain is to rank in search engine results. It was one of the first widely-adopted domain metrics and remains a common benchmark.

How it's calculated:

• Based on MOZ's link index (Link Explorer)
• Uses a machine learning model trained on actual search results
• Considers linking root domains, total number of links, and other factors
• Scored on a logarithmic scale — going from 20 to 30 is much easier than going from 70 to 80

What's a good DA?

Page Authority (PA)

Similar to DA but for individual pages. Useful for evaluating the ranking potential of a specific URL rather than the entire domain.

Spam Score

MOZ's Spam Score indicates the percentage of sites with similar characteristics that have been penalized or banned by Google. A high spam score (above 30%) is a red flag.

Common spam signals:

• Low content-to-code ratio
• Exact-match domain names
• Large number of external links relative to content
• Link profile dominated by a single source

Ahrefs Metrics

Domain Rating (DR)

Ahrefs' Domain Rating measures the strength of a website's backlink profile on a scale of 0 to 100. It's purely link-based and doesn't incorporate content or traffic signals.

How it's calculated:

• Looks at unique domains linking to the target
• Considers the DR of those linking domains
• Factors in how many other sites each linking domain points to
• Also uses a logarithmic scale

Key difference from DA: DR focuses exclusively on backlink quality and quantity, while DA also factors in predicted ranking ability.

Ahrefs Rank

A global ranking of all websites in the Ahrefs database by the strength of their backlink profile. Lower numbers are better. The #1 ranked site has the strongest backlink profile according to Ahrefs.

Organic Keywords & Traffic

Ahrefs estimates how many keywords a domain ranks for and how much organic traffic those rankings generate. These aren't authority metrics per se, but they provide valuable context:

• Organic keywords — Number of keywords the domain ranks for in the top 100
• Organic traffic — Estimated monthly visitors from organic search
• Traffic value — What that traffic would cost if purchased via Google Ads

A site with a high DR but low organic traffic may have a strong link profile but poor content—or it may be in a very niche market.

Majestic Metrics

Majestic takes a different approach, splitting authority into two complementary metrics.

Trust Flow (TF)

Trust Flow measures the quality of links pointing to a site. It traces link equity from a manually curated set of trusted seed sites (like government domains, major news outlets, and established educational institutions) through the web graph.

Scale: 0 to 100 Higher is better — indicates links from trustworthy sources.

Citation Flow (CF)

Citation Flow measures the quantity of links pointing to a site, regardless of quality. A site can have a high Citation Flow from sheer link volume, even if many of those links come from low-quality sources.

Scale: 0 to 100 Higher means more links — but not necessarily better links.

The TF/CF Ratio

The real power of Majestic's metrics lies in the ratio between Trust Flow and Citation Flow:

A site with TF 40 and CF 45 (ratio 0.89) has a much healthier link profile than a site with TF 15 and CF 60 (ratio 0.25), even though the second site has more total links.

Topical Trust Flow

Majestic also categorizes backlinks by topic, showing which subjects your site is most associated with. If you run a cooking blog but your top topical Trust Flow category is "gambling," that's a sign of an unnatural link profile.

Comparing Metrics Across Platforms

Here's how the three platforms' primary metrics compare:

Why Scores Differ for the Same Site

It's common to see wildly different numbers across platforms. A site might have DA 45, DR 62, and TF 28. This happens because:

1. Different link indexes — Each platform crawls the web independently and has a different set of discovered links
2. Different algorithms — DA uses ranking prediction, DR uses pure link strength, TF uses trust propagation
3. Different update schedules — A new batch of links might appear in Ahrefs before MOZ picks them up
4. Different weighting — Platforms disagree on how to value certain link characteristics

The takeaway: never rely on a single metric. Use them together.

Composite Scoring

Rather than choosing one platform's score, a composite approach provides the most balanced view. A composite domain score can combine metrics with weighted contributions:

Composite Score = (DA × 0.25) + (DR × 0.25) + (TF × 0.25) + (Normalized CF × 0.15) + (TF/CF Ratio × 10 × 0.10)

This formula balances three different methodologies while penalizing sites with inflated Citation Flow relative to their Trust Flow.

Red Flags in Domain Metrics

Watch for these warning signs when analyzing domain metrics:

Sudden Spikes

A DA or DR that jumps 20+ points in a month usually indicates artificial link building. Legitimate authority grows gradually.

High CF, Low TF

A Citation Flow significantly higher than Trust Flow suggests a large volume of low-quality or spammy backlinks.

High Authority, Low Traffic

If a site has DR 70 but only gets 500 organic visits per month, it may have acquired links through schemes rather than genuine content quality.

Declining Scores

A steady decline over months indicates lost backlinks. Check which links have been removed and whether your content is still attracting natural links.

Spam Score Above 30%

MOZ's Spam Score above 30% warrants investigation. Check for hacked pages, PBN links, or other toxic backlink sources.

How to Improve Your Domain Metrics

Improving domain metrics is a byproduct of building a healthy backlink profile. There are no shortcuts:

Create Linkable Content

• Original research and data studies
• Comprehensive guides (like this one)
• Free tools and calculators
• Infographics and visual assets

Build Relationships

• Guest posting on relevant, authoritative sites
• Participating in industry communities
• Collaborating on content with complementary brands

Fix Technical Issues

• Reclaim broken backlinks (find 404 pages that have inbound links and redirect them)
• Ensure your site is crawlable and indexable
• Use proper canonical tags to consolidate link equity

Monitor and Disavow

• Regularly audit your backlink profile for spam
• Use Google's Disavow Tool for toxic links you can't get removed
• Set up alerts for new backlinks so you can catch spam early

What Is a Domain Authority Score?

The term "domain authority score" is often used generically to refer to any metric that measures a website's overall SEO authority. Depending on who's using it, they might mean MOZ's Domain Authority, Ahrefs' Domain Rating, or a composite score that combines multiple sources.

When someone asks "what's my domain authority score?" they're typically looking for a single number that answers: how authoritative is my website compared to competitors?

How to Check Your Domain Authority Score

You can check your domain authority score through several tools:

1. WebScore — Shows DA (MOZ), DR (Ahrefs), TF, and CF (Majestic) in one dashboard. Run a free scan to see all your domain metrics at once.
2. MOZ Link Explorer — Free lookup for MOZ DA specifically
3. Ahrefs Webmaster Tools — Free DR check for verified sites
4. Majestic — Free TF/CF lookup with limited daily searches

What's a Good SEO Authority Score?

For most businesses, here's a realistic benchmark:

• New sites (0-6 months): DA/DR 5-15. This is normal — authority takes time.
• Growing sites (6-24 months): DA/DR 15-35. You're building momentum.
• Established sites (2-5 years): DA/DR 35-60. Competing for medium-difficulty keywords.
• Industry leaders: DA/DR 60+. Competing for virtually any keyword in your niche.

Don't obsess over the number itself. Focus on the trend — is your authority growing month over month? If yes, your SEO strategy is working.

Conclusion

No single domain metric tells the complete story of your site's authority. MOZ's Domain Authority predicts ranking potential, Ahrefs' Domain Rating measures raw backlink strength, and Majestic's Trust Flow and Citation Flow reveal link quality versus quantity.

The smartest approach is to track all of them together, watch for red flags, and focus on building genuine authority through great content and real relationships.

Want to see all your domain metrics in one dashboard? WebScore pulls in data from MOZ, Ahrefs, and Majestic to give you a unified view of your site's authority, updated with every scan.