Domain Authority is a ranking factor given by Moz Link Explorer tool which grades from 0 to 100 points. It’s similar to the Page Rank which used be considered and provided by Google earlier. Domain Authority is an essential factor in SEO Rankings.
Link Explorer is a tool to check Domain Authority of any website. Before this, Moz has OSE (Open Site Explorer) which was used to check the domain authority.
On 05th Mar 2019 Moz has launched Domain Authority 2.0 which has an improved algorithm. There was a massive noise from the top businesses in the launch of DA 2.0, as it has affected many companies domain authority. Some of the top companies DA has drastically gone down.
Before launching, they had communicated about the change in the algorithm and there was a Q&A session with the Moz Scientist Russ Jones. Here is my discussion with Russ:
Many SEO gurus consider it as a significant ranking factor to beat the keyword difficulty. In simple terms