Prior to 2016, one of the most commonly used metrics for search engine optimization was Pagerank. After Google hid the public Pagerank value, a new metric was needed that shows the SEO value of a website relatively realistically. This role is currently played by the DA (Domain Authority) and PA (Page Authority) values developed by moz.com.
The main difference between the two metrics is that the DA value indicates the strength and SEO value of the whole website, ie the domain. PA, on the other hand, measures the SEO value of a specific subpage. For both metrics, it calculates the search engine optimization value of a page based primarily on the number, quality, and relevance of inbound links to the page.
Both the Domain Authority and Page Authority values range from 1 to 100, depending on how strong the moz.com algorithm considers the page. By definition, it’s good for search engine optimization to have that number as high as possible. If we get a link from a sub-page with a high DA value and a high PA value during link building, it (if all other parameters are the same) will use more of our ranking in the Google results list than if a weaker page were linking to our page. Of course, it is not enough to look only at DA, PA values during link building. Relevance, how you link, and many other parameters are important.
Not all inbound links reinforce the value of DA, PA on our website, as there are links that violate Google’s policies that may reduce our Domain Authority value.
If all other parameters are correct, the higher the DA, PA of our website, the better it will perform in Google’s organic search results list.