A “authority” is a common word in search engine optimisation. It’s a term for describing a website or webpage’s reliability and excellence. The possible range of the number is from 0 to 100. Moz (SEO software) developed a metric called domain authority to measure a website’s strength in the eyes of search engines. Moz’s forecast of a site’s position in search engine results pages.

Domain Authority: What Is It?

Moz created the domain authority number to foretell a website’s position in search engine results. It’s a score from a search engine that doesn’t figure into Google’s algorithm and serves more as a guide than anything else.

Does that imply you can just forget about it? No. Although it is unlikely to be a genuine Google ranking factor, it can serve as a metric and guideline to give webmasters a rough idea of how their sites might fare in the search results. Additionally, it can assist you in comprehending and evaluating your website’s success in relation to that of your rivals.

When Does a Domain Have Good Authority?

The possible values for a domain’s authority score vary from 1 to 100. However, it is a dynamic metric as it is relative to shifts in the website and its rivals over time. A higher number, however, indicates a greater likelihood of your website appearing in search engine results.

Sites like Wikipedia and Google.com, which have many external connections, tend to rank highest. This is due to the fact that the SEO tool takes into account both the content and quantity of a website’s links. For instance, a website’s chances of getting a high score improve if it has connections from reputable sources like Google, Wikipedia, or official government sites.

How Do They Figure Domain Reputation?

The following criteria are used to determine a site’s domain authority:

Through a complex calculation that takes into account a variety of variables, such as the total number of links and linking root domains, the DA (Domain authority) score is arrived at. 
Moz implemented a new algorithm (domain authority 2.0) at the start of 2019. Using machine learning, it would anticipate a domain’s score based on how frequently it would appear in Google’s search results.
Because the DA score is computed using machine learning, it is natural for the value to occasionally fluctuate. This is because a user with poor authority will have an even lower website score if there are fewer data points to work with. A billion more connections to Instagram or Facebook than to any other site would cause a drop in those other sites’ scores. The reason for this is straightforward: being older and more authoritative than competing sites means they occupy a more desirable position higher in the ranking.

The Best Ways to Look Up Your Domain’s Authority

Access your Moz DA for free in either the SERP analysis part of the keyword explore or by going to the Link Explorer and clicking on the Mozbar.
This is how it will turn out. Simply enter your website’s URL to see your DA number.

Domain Authority Changes

A website’s DA scores can fluctuate for a variety of reasons, and it can be difficult for the webmaster to pinpoint precisely what caused the fluctuation. Another reason is the complexity of evaluating the final number. So, here are some possibilities that may cause your DA level to shift.

The expansion of the link profile was not recorded by the web database.
There may have been a rise in links to authoritative sites, which could have a ripple effect on other websites.
Poorly performing websites were used as a link provider.
The number of links crawled may have decreased or increased since you last viewed the domain’s score.
Your site’s domain reputation has dropped because other sites’ rapid link expansion has pushed it further down the scale.
Since the new DA version introduced a reorganisation of the DA score’s calculation, it’s possible that this also had an effect on your score.
The takeaway here is that there are other sites with greater authority and establishment, so even if a website improved its performance, it might not get a higher score on domain authority. 

The Meaning of “Page Authority”

In contrast to domain authority, which evaluates the overall strength of a complete domain, page authority evaluates the strength of individual web pages. It’s another metric for gauging a page’s relative performance in search engine results that Moz has created. It can aid marketers by allowing them to anticipate how their sites will fare in search engine results.

Just like domain authority, page authority takes into account a wide variety of signals to determine your position. This also reflects the fundamental aspects that affect Domain Authority. Search engines determine a website’s ranking based on a number of factors, including the quality of the linking domains and the number of links to the page.