Generally speaking, sites with very large numbers of high-quality external links (such as or ) are at the top end of the Domain Authority scale, whereas small businesses and websites with fewer inbound links may have much lower DA scores. What is a good or average Domain Authority score? For this reason, it’s important to use Domain Authority as a comparative metric rather than an absolute one.

Therefore, it's significantly easier to grow your score from 20 to 30 than it is to grow it from 70 to 80. Because more established and authoritative domains like Facebook will have increasingly larger link profiles, they take up more of the high-DA slots, leaving less room at the higher end of the scale for other domains with less robust link profiles.

For instance, if were to acquire a billion new links, every other site’s DA would drop relative to Facebook’s. Since DA is based on machine learning calculations, your site's score will often fluctuate as more, fewer, or different data points become available and are incorporated into those calculations. Learn more about the Domain Authority update and how to discuss it with your team with this presentation, or explore how to use DA 2.0 metrics with this comprehensive whitepaper. If domain A is more likely to appear in a Google SERP than domain B is, then we would expect domain A's DA to be higher than domain B's DA. Domain Authority is not a Google ranking factor and has no effect on the SERPs.Īs of the Domain Authority 2.0 update in early 2019, the calculation of a domain's DA score comes from a machine learning algorithm’s predictions about how often Google is using that domain in its search results. This score can then be used when comparing websites or tracking the 'ranking strength' of a website over time. Domain Authority is calculated by evaluating multiple factors, including linking root domains and total number of links, into a single DA score.

Moz authority check