SEO has long been looking for a universal number that could supposedly explain a website’s strength at a glance. That is why there is so much attention around Domain Authority, Domain Rating, URL Rating, Authority Score, Trust Flow, and Citation Flow.
Confusion starts when these scores are treated as Google signals. In reality, search does not work through public scores created by third-party tools. Google relies on its own link analysis systems, page-level signals, and some site-wide signals. So high DR or DA may accompany a strong website, but that does not mean Google ranks pages by those numbers.
It is better to treat these metrics more calmly: they help when comparing websites, screening potential donors, analyzing competitors, and quickly reviewing a backlink profile. But to see the real picture, indexing, page relevance, link quality, site structure, and data from Google Search Console still matter more.
Why Google cannot be reduced to a single score
Google does not have a public metric that could honestly be called an official domain authority score. The company describes ranking as the work of multiple systems and signals, not one shared scale for all websites. PageRank is still part of search, but it is not the same as DA, DR, or any other third-party score.
A simple example shows why. A website may have a strong backlink profile and still lose in the SERP because the page targeting the query is weak, the search intent match is poor, there are indexing issues, or technical barriers get in the way. In situations like this, looking only at an authority metric is not enough. You need to review the page itself, the site structure, and the overall technical condition of the website. That is why, in website SEO , these metrics are useful only as supporting reference points.
What DA, DR, UR, AS, TF, and CF actually measure
| Metric | Tool | Level | What it shows |
|---|---|---|---|
| DA | Moz | Domain / subdomain | The predicted strength of a domain in Moz’s model |
| DR | Ahrefs | Domain | The strength of a domain’s backlink profile in the Ahrefs index |
| UR | Ahrefs | Page | The strength of the backlink profile of a specific URL |
| AS | Semrush | Domain or page | A combined score based on links, organic visibility, and spam indicators |
| TF | Majestic | URL and domain | The quality of the backlink profile |
| CF | Majestic | URL and domain | The strength and volume of backlink equity without focusing on quality |
All of these metrics were created by SEO tools, not by Google. They are useful for analysis, but each one is calculated with its own formula, its own database, and its own evaluation logic.
DA and what this metric actually shows
Moz DA is not a Google ranking factor. It is a predictive score that helps Moz compare domains with one another. It can be useful when you need a quick sense of whether one website looks stronger than another within the same niche, but it should not be treated as an official search engine signal.
It is also important not to mix up domain authority and page authority. In the page authority vs domain authority comparison, the two metrics reflect different levels of evaluation: the first applies to a specific page, while the second applies to the domain or subdomain as a whole. When you are analyzing the potential of an individual URL, a page-level metric often tells you more than a site-wide score.
DR and UR: the difference between domain-level and page-level strength
Ahrefs DR reflects the strength of a domain’s backlink profile, while UR looks at a specific page. That is why the url rating vs domain rating comparison only makes sense when you know what exactly you are analyzing: a single URL or the entire domain.
This becomes clear when selecting pages for placements. A specific URL may have a strong UR even on a domain with only mid-range DR. The opposite also happens: the domain looks solid, but the placement page itself is weak, has almost no signals of its own, and lacks normal visibility. That is why DR should not be automatically projected onto every internal page of a site.
DA vs DR: why they are so often confused
The da vs dr comparison sounds logical, but many people make the false assumption that both metrics measure the same thing. In reality, domain authority vs domain rating means two different models. They rely on different indexes, calculate link signals differently, and should not be read as one shared scale.
That is why queries such as domain rating vs domain authority or domain authority vs domain rating do not have one short universal answer. DR is convenient when you need a quick view of domain-level link strength in Ahrefs. DA is useful for comparative analysis within the Moz ecosystem. Directly comparing the numbers across these tools almost always oversimplifies the picture.
Authority Score (AS) by Semrush
Semrush Authority Score differs from DA and DR because it is not limited to links alone. It combines link signals, organic visibility, and some signs the tool interprets as spam indicators. Because of that, AS can be useful for a first pass when screening out weak or questionable donor sites.
Still, it should not be oversimplified. A high AS does not automatically mean that any link from that site will be valuable. You still need to look at the page the link comes from, whether it is indexed, how closely the donor’s topic matches yours, and whether the placement looks natural.
TF and CF in Majestic
Majestic TF and CF are best read together. TF reflects backlink quality, while CF shows the strength or volume of link equity. That is why terms such as majestic trust flow, majestic citation flow, majestic tf, and majestic cf are often used together: on their own, they provide less context.
When CF noticeably outpaces TF, the profile deserves a closer look. That does not automatically make the donor bad, but it does suggest that the quantity of links may not be supported by their quality. When TF holds at a healthy level relative to CF, the profile usually looks cleaner.
Do these metrics affect SEO
They do not have a direct impact on rankings. Google does not use DA, DR, UR, AS, TF, or CF as official ranking signals. At the same time, strong websites often have high scores across different tools, and that is exactly what creates the myth that third-party metrics are part of Google’s algorithm.
The important thing here is to separate correlation from cause. A strong website usually has better links, stronger pages, more stable visibility, and a cleaner structure. Third-party tools can see that too, which is why they assign higher scores. But a rise in DR or DA on its own does not guarantee better positions.
So if one of these metrics drops after a tool updates its index, that should not be treated as a Google problem right away. It is far more important to look at what is happening with your pages, queries, clicks, impressions, and visibility. And if there are signs that the issue is not in link metrics but in the site itself, it makes more sense to review indexing, technical condition, and site structure through a technical SEO audit .
Where these metrics are genuinely useful
-
For initial donor screening before manual review.
-
For comparing your own website with direct competitors in the same niche.
-
For evaluating the strength of an individual page when the specific URL matters more than the domain-wide metric.
-
For quickly spotting profiles where the number of links does not match their quality.
-
For supporting analysis in link building, outreach, and audits.
Even so, none of these metrics should be used as the only filter. When evaluating a donor, topic relevance, indexing, the quality of the placement page, the site’s actual visibility, content, and the overall cleanliness of its profile still matter. This also connects to the question of how a website gets indexed by search engines , because even a strong donor will do little if the page carrying the link barely exists in search.
Most common mistakes
-
Buying placements based only on high DR, DA, or CF.
-
Comparing scores from different tools as if they were calculated on one shared scale.
-
Looking only at the domain and ignoring the actual page where the link will appear.
-
Turning DR or DA growth into the main KPI of SEO work.
-
Ignoring indexing, relevance, content quality, and user intent.
Conclusion
DA, DR, UR, AS, TF, and CF are useful in SEO not as a substitute for Google’s systems, but as supporting reference points. They are convenient for filtering, comparison, and fast analysis, but they are not official ranking factors.
That is why they should be viewed soberly. A good-looking score in a tool interface does not make a website strong on its own. Real search performance is still shaped by pages, content, links, indexing, structure, and how well the page meets the query it is trying to rank for.
