Domain Authority measures how likely a search engine is to rank your website high in results
Domain Authority is a score from 1 to 100 that predicts how well a search engine will rank your entire website in search results. A higher score means search engines see your site as more trustworthy and relevant, so your pages are more likely to appear near the top when someone searches for what you write about. The score is calculated by looking at how many other websites link to yours, how authoritative those linking sites are, and how old your domain is.
Domain Authority is not a Google metric — it comes from a company called Moz, which analyzes search patterns and publishes the score as a reference tool. Google does not publish its own authority score for websites, but it does use similar signals (like backlinks and site age) when deciding where to rank you. Think of Domain Authority as a third-party estimate of what Google probably thinks about your site.
You cannot directly improve your Domain Authority score the way you improve a test grade. Instead, you improve it by doing the things that make search engines trust your site: publishing original content, earning links from other reputable websites, and keeping your site working properly. The score updates roughly once a month.
Key Takeaways
- Domain Authority ranges from 1 to 100 and estimates how likely search engines are to rank your website high in results.
- The score is based mainly on how many other websites link to yours and how authoritative those sites are themselves.
- Domain Authority comes from Moz, not Google, but it reflects the same signals Google uses to rank websites.
- You improve your Domain Authority by earning backlinks from reputable sites, publishing original content, and maintaining a working website over time.
- A higher Domain Authority makes it easier for new pages on your site to rank, even if those pages are brand new.
How Domain Authority is calculated
Moz builds Domain Authority by analyzing two main things: the quantity and quality of links pointing to your website from other sites. A link from a major news outlet or an established industry site counts for much more than a link from a brand-new blog. The algorithm also considers how many links those linking sites receive themselves — a site with high authority passing a link to you is worth more than a site with low authority.
The score also factors in how long your domain has existed. A website that has been around for five years will typically have a higher score than an identical site launched last month, because age suggests stability and gives the site time to earn links naturally. Moz also looks at whether your site is mobile-friendly, loads quickly, and has no major technical errors, though these are smaller parts of the overall calculation.
Domain Authority is not the same as Page Authority, which scores individual pages rather than your whole domain. A single page on your site might rank well even if your overall Domain Authority is low, but a high Domain Authority makes it easier for all your pages to rank.
Why Domain Authority matters for search visibility
Search engines use authority as a tiebreaker. When two websites both have content about the same topic, the search engine will usually rank the site with higher authority first, assuming both pages are reasonably well-written and relevant. This means a site with a Domain Authority of 45 will typically outrank a site with a Domain Authority of 20, even if the lower-authority site's content is slightly better.
Domain Authority also affects how quickly new pages on your site get indexed and ranked. When you publish a new article on a high-authority site, search engines crawl it faster and start ranking it sooner. On a low-authority site, the same article might take weeks to appear in search results at all. This is why established websites can launch new content and see traffic within days, while new sites often wait months for visibility.
For a small business or new website, this creates a catch-22: you need traffic to earn links, but you need links to get traffic. The way out is to focus on earning links from sites that already link to similar content, writing content that other sites naturally want to link to, and being patient while your domain ages.
The difference between Domain Authority and actual Google rankings
Domain Authority is a prediction tool, not a may provide. Moz publishes it to help people understand how search engines think about websites, but Google does not use a "Domain Authority" score internally. Google has its own systems for measuring site authority, and those systems are not public.
This means a site with a high Domain Authority might still rank poorly if its content does not match what people are searching for. A site with a low Domain Authority might rank well for a specific topic if it has written the best, most detailed article on that topic. Domain Authority is one signal among many — it helps, but it does not determine your ranking alone.
You should also know that Domain Authority can fluctuate month to month, sometimes by several points. This does not mean your site got better or worse overnight. Moz updates its data and recalculates scores regularly, and small changes in the underlying data can shift the score. A drop of 2 or 3 points is normal and usually not a sign of a problem.
How to check your Domain Authority
You can check your Domain Authority for free using Moz's Link Explorer tool. Go to linkexplorer.com, type in your domain name, and the tool will show you your current score along with other data like the number of backlinks you have and which sites are linking to you. You do not need to create an account to see the basic information, though a free account lets you check multiple domains and track changes over time.
Other tools also estimate domain authority using similar methods. SEMrush, Ahrefs, and Majestic all publish their own authority scores (called Domain Rating, Domain Authority, and Trust Flow, respectively). These scores are usually similar but not identical, because each company uses slightly different data and algorithms. If one tool shows your site at 35 and another shows 38, both are probably close to accurate.
Checking your Domain Authority once a month is useful for tracking progress, but do not obsess over small changes. Focus instead on the underlying actions: earning backlinks, publishing original content, and keeping your site technically sound. The score will follow.
How to build Domain Authority over time
The most direct way to build Domain Authority is to earn backlinks from other websites. This happens naturally when you publish content that other people find useful and want to reference. If you write a detailed guide to something in your industry, other websites in that industry may link to it. If you publish original research or data, journalists and bloggers may cite you.
You can also earn links by reaching out to relevant websites and asking them to link to your content. This works best when you have something genuinely useful to offer — a tool, a study, a resource list — rather than just asking for a link. Many websites have a "resources" page or a "links" section where they list helpful sites in their field. If your site fits, a polite email asking to be included sometimes works.
Beyond links, focus on the fundamentals: publish original content regularly, keep your site fast and mobile-friendly, fix broken links, and maintain an active site for years rather than months. A site that has been publishing consistently for three years will have higher authority than a site that published heavily for six months and then went quiet. Search engines reward longevity.
Domain Authority for new websites and small businesses
If your site is brand new, your Domain Authority will start at 1. This is normal and not a reflection of your content quality. New sites have no backlinks yet and no history, so the score starts at zero. Over the first year, as you publish content and earn a few links, your score will climb — typically to somewhere between 10 and 20 if you are doing basic things right.
For a small business or local website, you do not need a high Domain Authority to rank well. Local search results (the map and business listings that appear when someone searches for a service near them) are based on different signals — mainly your business location, reviews, and how complete your business information is. A plumber in a small town can rank first in local results with a Domain Authority of 5, as long as their Google Business Profile is complete and they have good reviews.
The key is to match your effort to your goal. If you are trying to rank nationally for a competitive topic, Domain Authority matters more. If you are trying to reach local customers or rank for a niche topic with less competition, you can succeed with lower authority by focusing on relevance and content quality instead.
Frequently Asked Questions
Can I improve my Domain Authority quickly?
No. Domain Authority is based on backlinks and site age, both of which take time to build. You might see a 2 or 3 point increase in a month if you earn several high-quality links, but jumping from 20 to 50 takes years of consistent work. Focus on the long-term actions — publishing good content and earning links naturally — rather than looking for shortcuts.
Does Domain Authority affect my Google rankings directly?
Not directly. Google does not use a "Domain Authority" score. However, Google does use similar signals — backlinks, site age, and trustworthiness — to decide where to rank you. Domain Authority is a useful estimate of those signals, but it is not the thing Google is actually measuring.
Is a Domain Authority of 30 good?
It depends on your industry and competition. For a new site or a niche topic, 30 is solid. For a site competing in a crowded field like finance or health, 30 is below average. Compare your score to your main competitors' scores to see where you stand relative to them.
What if my Domain Authority dropped?
Small drops (2 to 5 points) are usually just Moz updating its data and recalculating. Larger drops might mean you lost some backlinks or a major linking site lost authority itself. Check which links you have lost using Link Explorer, and focus on earning new ones rather than worrying about the score itself.
Do I need high Domain Authority to make money from my website?
No. You can make money from a low-authority site if you rank well for specific keywords your audience is searching for, or if you have a loyal audience that does not come from search. Domain Authority helps with search visibility, but it is not required for a profitable website.