DA is measured on a scale of 1 to 100. The closer you are to 100, the more traffic and better ranking you’ll have.
Moz suggests improving your overall SEO in order to improve your DA. That’s not surprising, considering SEO is a big part of any successful site’s strategy.
Unfortunately, there are no documented cases of any particular SEO techniques increasing DA more than others. All we know is that enhancing SEO is important.
That means focusing on improving Quality Link Building- SEO. Like I said , improving your DA should be part of your SEO strategy.