What Is Domain Authority and Does It Matter for St. George, Utah Business Websites?

If you have ever researched SEO for your St. George business, you have probably come across the term domain authority. Maybe a competitor mentioned their DA score, or you ran a free SEO audit and saw a number between 1 and 100 with no explanation of what it means. Domain authority is one of the most talked-about metrics in search engine optimization, and it is also one of the most misunderstood. For small business owners in St. George, Utah, the question is not just “what is domain authority?” but “does it actually affect whether my customers can find me on Google?” This post breaks down exactly what domain authority is, where it comes from, how it is calculated, and whether your DA score should be on your radar if you are trying to grow a business in Southern Utah or Washington County.

What Is Domain Authority?

Domain authority, often abbreviated as DA, is a score developed by the SEO software company Moz. It predicts how likely a website is to rank in search engine results pages, based on a scale from 1 to 100. The higher the score, the stronger the site’s overall link profile is considered to be.

New websites typically start with a DA score around 1. Established sites with thousands of quality backlinks, like Wikipedia or the New York Times, sit in the 90s. Most local business websites in St. George and Southern Utah fall somewhere between 10 and 40, and that is completely normal.

The important thing to understand upfront: domain authority is a third-party metric. Moz created it. Google did not. It is a useful compass, not a ranking factor inside Google’s algorithm.

Where Does DA Come From?

Moz introduced domain authority as a way to give website owners a single, easy-to-read number that approximates their site’s overall strength relative to competitors. Before tools like Moz, Google used to publicly share its own metric called PageRank, which served a similar purpose. When Google retired public PageRank scores in 2016, third-party tools like Moz, Ahrefs, and Semrush stepped in with their own versions.

Today, you will hear several related terms: Moz’s Domain Authority, Ahrefs’ Domain Rating (DR), and Semrush’s Authority Score. They all measure roughly the same concept through slightly different formulas, and none of them are official Google metrics.

How Is Domain Authority Calculated?

Moz calculates DA using a machine learning model that factors in dozens of signals from its own web index. The most significant factor is the quantity and quality of backlinks pointing to your site. A backlink from a high-authority news site carries far more weight than a backlink from a brand-new blog with no traffic.

Key Signals That Influence DA

• Number of linking root domains: How many unique websites link to yours, not just how many total links exist.
• Quality of linking sites: A link from the St. George Spectrum newspaper or Dixie Technical College carries more weight than a link from a random, low-traffic directory.
• Relevance of linking sites: Links from websites in related industries or your geographic area are generally more valuable.
• Spam score of linking domains: Links from spammy or penalized sites can actually drag your score down.
• Internal link structure: How your own pages link to each other also plays a supporting role.

Because DA is calculated on a logarithmic scale, improving from a DA of 10 to 20 is much easier than improving from 60 to 70. The higher you go, the harder each point becomes to earn.

Does Google Actually Use Domain Authority?

No. Google has confirmed multiple times that it does not use Moz’s domain authority score in its ranking algorithm. Google has its own internal systems for evaluating link quality and site authority, and those systems are not publicly available.

That said, DA tends to correlate with Google rankings because both are influenced by the same underlying factor: the quality and quantity of backlinks. Sites that rank well on Google usually have strong backlink profiles, which also results in higher DA scores. The correlation is real even if the direct connection is not.

Think of DA as a thermometer. It does not make you sick or healthy, it just reflects what is already happening inside your site’s link profile.

Does DA Matter for St. George, Utah Businesses?

For most St. George businesses competing in local search, domain authority matters less than many SEO vendors suggest, but it is not irrelevant either. Here is the practical answer: if you are trying to rank for terms like “plumber in St. George” or “Washington County family dentist,” you are competing against other local businesses, not national corporations. Most of your local competitors have DA scores in the 10 to 35 range.

In that environment, having a DA of 25 instead of 15 will not automatically push you to the top of Google. What matters more in local SEO are your Google Business Profile, your on-page content, and the consistency of your business information across the web. We cover this in more depth in our post on what backlinks are and why they matter for your website.

Where DA becomes more relevant is if you are targeting competitive, high-volume keywords that attract national competition. A St. George law firm trying to rank for “personal injury attorney” will face national legal directories with DA scores above 70. In that case, building your own domain authority becomes a meaningful part of your strategy.

What Is a Good DA Score for a Local Business?

There is no universal “good” score. Domain authority is a comparative metric, which means it only makes sense in context. A DA of 30 could be excellent for a local HVAC company in Hurricane, Utah, and weak for a Southern Utah university trying to compete nationally.

General DA Benchmarks for Local Businesses

• DA 1 to 15: New or very young websites with few external backlinks. Normal for businesses that just launched online.
• DA 16 to 30: Established local business sites with some backlinks from local directories, news mentions, and partner sites. Competitive in most St. George local searches.
• DA 31 to 50: Sites with a real link-building history. Competitive for broader regional searches across Washington County and Southern Utah.
• DA 51 and above: Strong authority, typically built over years. Common among regional publications, universities, and larger service companies.

The more useful question is: what is your DA compared to the top-ranking competitors for your specific target keywords? If you are at 20 and they are all at 18 to 25, you are already in range. Focus your energy on content and on-page optimization rather than obsessing over the number.

Domain Authority vs. Domain Rating: What Is the Difference?

Moz uses the term Domain Authority. Ahrefs uses Domain Rating (DR). Semrush uses Authority Score. All three tools are trying to measure the same thing from slightly different angles, and they will often give the same website different scores.

Moz DA puts heavier emphasis on its own web index and spam filtering. Ahrefs DR focuses more tightly on the raw quantity and quality of backlinks in its index. Semrush Authority Score blends backlink data with organic traffic signals. None of them is definitively “right.” They are each estimates built from the data that specific tool has access to.

For most St. George business owners, it does not matter which one you track as long as you track it consistently over time. Pick one tool and use it as your benchmark to measure progress.

How to Improve Your Domain Authority

Since DA is primarily driven by backlinks, improving it means earning more high-quality links from other websites. This is not a quick process, but it is straightforward when you have a consistent strategy. Our detailed guide on how many backlinks you need to rank in search results breaks down the numbers behind this in more depth.

Practical Ways to Build Backlinks in St. George and Southern Utah

• Get listed in local directories: The St. George Chamber of Commerce, Washington County business listings, and Utah-specific directories are all solid starting points. These links are locally relevant and relatively easy to earn.
• Earn mentions from local press: The St. George Spectrum, St. George News, and local television stations occasionally cover small business stories. A news mention almost always includes a backlink.
• Create content other sites want to link to: Original data, local guides, and useful resources attract natural backlinks over time. A “Best Hiking Trails Near St. George” post on a tourism-adjacent business site, for example, has genuine link-earning potential.
• Partner with complementary local businesses: Cross-referral links between non-competing businesses, like a wedding photographer linking to a St. George florist, are natural and effective.
• Sponsor local events or organizations: Many nonprofits and event organizers list sponsors on their websites with backlinks.
• Audit and remove toxic backlinks: Use Google Search Console or Moz’s Link Explorer to identify spammy links pointing to your site and disavow them. Bad links can pull your DA down.

What Does Not Work

Buying bulk backlinks from link farms, submitting to hundreds of low-quality directories, or using private blog networks (PBNs) can temporarily inflate your DA but will likely result in a Google penalty that is far more damaging than a low DA score. These tactics violate Google’s guidelines and are not worth the short-term gain.

Domain Authority and Local SEO in Southern Utah

Local SEO operates somewhat differently from traditional organic SEO, and DA plays a smaller role in it. The Google Map Pack results, which show up at the top of searches like “plumber near me” or “St. George HVAC company,” are driven primarily by proximity, Google Business Profile optimization, and review signals, not by your domain authority score.

However, the organic results below the Map Pack are influenced by backlinks and domain authority. If your business appears in both the Map Pack and the organic results, you effectively own more real estate on the page. Building DA is part of a complete local SEO strategy, even if it is not the most urgent priority for newer sites.

For businesses in surrounding areas like Cedar City, Hurricane, Ivins, Santa Clara, and Washington, the competitive landscape is often less intense than in St. George proper. A modest DA score in the 15 to 25 range may be fully sufficient to dominate local searches in those markets.

Common Domain Authority Mistakes St. George Businesses Make

After working with businesses across Washington County and Southern Utah, we see the same DA-related mistakes come up repeatedly. Knowing what to avoid saves time and money.

Treating DA as a Google Ranking Factor

DA does not directly influence where you rank on Google. Treating it as though it does leads business owners to chase a number instead of focusing on the factors that actually move the needle: great content, a strong Google Business Profile, and genuine backlinks.

Panicking Over a Low DA Score

A brand-new local business website with a DA of 8 is not broken. It is new. Domain authority builds over months and years, not days. The businesses that outrank you in St. George searches likely have websites that have been active for five or more years. That history cannot be shortcut, but it can be built deliberately.

Buying Cheap Backlinks to Inflate the Number

Purchased links from low-quality sources may raise your DA temporarily on a Moz report, but they do not help you rank on Google and they carry real penalty risk. The ROI on cheap link schemes is almost always negative over any meaningful time horizon.

Ignoring DA Entirely

The other extreme is dismissing DA as meaningless. It is a useful directional metric. If your DA is declining over time, that is a signal worth investigating. It may mean you are losing backlinks, that competitors are pulling ahead, or that your site has accumulated low-quality links that need to be cleaned up.

When DA Matters Most for Your Website

Domain authority is most relevant in three specific situations. First, when you are competing against national or regional websites for high-volume keywords. Second, when you are evaluating a potential link partner or guest post opportunity and want to know if their site is worth your time. Third, when you are tracking the progress of an active link-building campaign over time.

For the majority of St. George and Southern Utah small businesses targeting local keywords, DA is one signal among many. It should be on your dashboard, but it should not be the centerpiece of your SEO strategy. If you want a deeper understanding of how