What is authority score? Authority Score is a Semrush metric that helps estimate the overall quality and SEO strength of a domain or webpage.
It matters for SEO because it can help you compare websites, review backlink prospects, and analyze competitors. However, Authority Score should not be used alone to judge whether a website is strong, safe, or worth contacting.
In this guide, you will learn how Semrush Authority Score works, how to read it, and how to use it properly for backlink analysis and competitor research.
What Is Authority Score in SEO?
Authority Score is a third-party SEO metric used inside Semrush. It is shown on a 100-point scale and estimates the overall quality of a domain or webpage using Semrush data. A higher score usually suggests that Semrush sees stronger overall domain quality based on link power, organic traffic, and spam-related signals.
However, Authority Score is not a Google metric. It is a Semrush score, not an official ranking score from Google.
In simple terms, Authority Score tries to answer this question:
“How strong does this domain or page look based on Semrush’s available data?”
For example, a large industry publication may have a high Authority Score because it has strong backlinks, visible organic traffic, and a natural-looking link profile. Meanwhile, a new blog may have a low score because it has fewer backlinks and less search visibility.
That does not mean the high-score site is always better for every SEO decision.
How Semrush Authority Score Works
Semrush Authority Score is a compound metric. This means it combines several signals instead of relying on one number.
The main areas include:
- Link power
- Organic traffic
- Spam-related factors
- Backlink profile strength
- Referring domains
- Signs of unnatural link behavior
Because of this, Authority Score can give you a quick view of domain quality. However, it should still be followed by manual review.
For example, a website may have many backlinks, but if those links come from weak, unrelated, or suspicious sites, the score may not tell the full story. In contrast, a smaller site with fewer links may still be valuable if it has strong topical relevance and real organic traffic.
Is Authority Score a Google Ranking Factor?
What is authority score useful for if Google does not use it directly?
Authority Score is useful for comparison, but it is not a Google ranking factor. Semrush creates the score using its own data and model.
This matters because beginners often treat authority score SEO metrics like official Google scores. They are not.
A page can rank with a low Authority Score if it matches search intent well, has useful content, and targets a realistic keyword. Meanwhile, a high Authority Score website can still have poor pages that do not rank.
Therefore, use Authority Score as a guide, not as the final answer.
Authority Score vs Domain Rating vs Domain Authority
Authority Score, Domain Rating, and Domain Authority are often discussed together, but they come from different SEO tools.
| Metric | Tool | What it estimates |
| Authority Score | Semrush | Overall domain or page quality using links, traffic, and spam-related signals |
| Domain Rating | Ahrefs | Strength of a website’s backlink profile |
| Domain Authority | Moz | A domain’s ranking potential based on Moz data |
| URL Rating | Ahrefs | Strength of one specific page’s backlink profile |
For example, one website may show a Semrush Authority Score of 35, an Ahrefs Domain Rating of 42, and a Moz Domain Authority of 28.
That does not mean one tool is wrong. Instead, each platform uses its own data source, formula, and scoring model.
If you want to compare these metrics properly, read our guide on [what is domain rating].
Authority Score vs Organic Traffic
Authority Score and organic traffic are not the same thing.
A site can have a high Authority Score but weak organic traffic. This can happen when a domain has many backlinks but poor content, irrelevant links, outdated pages, or weak search intent targeting.
Meanwhile, a lower Authority Score website can still get valuable organic traffic if it targets long-tail keywords and publishes useful content.
Before judging a website, check:
- Organic traffic
- Traffic trend
- Referring domains
- Backlink quality
- Content quality
- Topical relevance
- Outbound link behavior
- Spam signals
This is especially important for backlink outreach. A high Authority Score site with spammy outbound links may not be a good link prospect.
For deeper review steps, read our guide on [what is backlink analysis].
What Is a Good Authority Score?
There is no universal “good” Authority Score.
A good score depends on your niche, competitors, and website stage. For example, an Authority Score of 25 may be strong in a small local niche, but weak in a competitive software market.
Instead of asking whether your score is good in general, compare it with similar websites.
Ask these questions:
- What scores do my direct competitors have?
- Are those sites getting organic traffic?
- Do they have relevant backlinks?
- Are their top pages ranking?
- Is their backlink profile natural?
- Are they strong in my actual topic area?
Because of this, Authority Score is most useful when used as a benchmark inside your market.
How to Check Authority Score
You can check Authority Score inside Semrush tools such as Domain Overview, Backlink Analytics, Backlink Audit, and Website Authority Checker.
When using an authority score checker, do not stop at the number.
Review these areas:
- Backlink profile strength
Check how many quality websites link to the domain. - Referring domains
Look at the number of unique websites linking to the site. - Organic traffic
Check whether the site gets real search visibility. - Traffic trend
Review whether the site is growing, flat, or declining. - Spam signals
Look for unnatural link patterns or suspicious backlink growth. - Outbound links
Check whether the site links to relevant pages or spammy industries.
This process helps you avoid trusting one score blindly.
How to Use Authority Score for Backlink Research
Authority Score can help you filter backlink prospects, but it should not replace manual review.
For example, if you export a list of websites for guest post outreach or resource page outreach, you can sort the list by Authority Score. However, before pitching any website, review the site yourself.
A good backlink prospect usually has:
- Relevant content
- Real organic traffic
- Natural outbound links
- Clear editorial standards
- A related audience
- A clean backlink profile
- A logical reason to link to your page
A weak backlink prospect may have a high Authority Score but publish unrelated guest posts, link to spammy pages, or show a sharp traffic decline.
Because of this, Authority Score should be a filter, not the final decision.
For organizing outreach prospects, read our guide on [link building outreach tracking].
How to Improve Authority Score Safely
If you want to know how to improve authority score, focus on improving real website quality.
Do not chase the number directly. Instead, build a stronger site that earns better backlinks and organic visibility.
Safe ways to improve Authority Score include:
- Publishing useful original content
- Earning links from relevant websites
- Creating linkable assets such as templates or tools
- Improving existing content that already gets impressions
- Building topic clusters around important subjects
- Removing or avoiding spammy link tactics
- Strengthening internal links between related pages
- Improving pages that attract backlinks
- Promoting content to relevant communities
In addition, avoid buying links from link farms or using bulk guest post networks. These tactics can create risk and may not help your real SEO performance.
For safer outreach planning, read our guide on backlink outreach mistakes.
Common Authority Score Mistakes Beginners Make
Beginners often misuse Authority Score because the number looks simple.
Avoid these mistakes:
- Treating Authority Score as a Google ranking factor
- Judging websites by Authority Score alone
- Ignoring organic traffic
- Ignoring topical relevance
- Chasing high-score backlinks from unrelated websites
- Buying links only to increase Authority Score
- Ignoring spam signals
- Comparing your site with unrelated industries
- Panicking when the score changes slightly
- Using Authority Score as the only outreach filter
Sometimes Authority Score changes because Semrush updates data, finds new links, loses old links, or detects changes in traffic and spam patterns.
Therefore, small score changes should not always trigger a major SEO decision.
FAQs
What is Authority Score in SEO?
Authority Score is a Semrush metric that estimates the overall quality and SEO strength of a domain or webpage. It is useful for comparison, but it is not a direct Google ranking factor.
What is Semrush Authority Score?
Semrush Authority Score is a website authority metric shown on a 100-point scale. It uses signals such as backlink data, organic traffic, and spam-related factors.
Is Authority Score important for SEO?
Authority Score is useful for competitor research and backlink analysis. However, it should be reviewed together with organic traffic, referring domains, content quality, and topical relevance.
Is Authority Score a ranking factor?
No. Authority Score is not a Google ranking factor. It is a third-party metric created by Semrush to estimate domain or page quality.
What is a good Authority Score?
A good Authority Score depends on your niche and competitors. Compare your score with similar websites instead of judging it in isolation.
How do I improve Authority Score?
You can improve Authority Score by earning relevant backlinks, growing organic traffic, publishing useful content, improving internal links, and avoiding spammy link tactics.
Conclusion
What is authority score? Authority Score is a Semrush metric that helps estimate the overall quality and SEO strength of a website or webpage.
It can be useful for backlink analysis, competitor research, and link prospecting. However, it should not be used alone to judge a website.
Always review Authority Score together with organic traffic, referring domains, backlink quality, spam signals, content quality, outbound link behavior, and topical relevance. As a result, you can make better SEO decisions and avoid chasing high-score websites that offer little real value.
If you want to improve your backlink analysis and SEO decision-making with other beginner and semi-intermediate site owners, join the Scale Xpert community here.
