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In addition to all the features that went into calculating the old DA, we consider the quality of the site that links to the domain you’re researching. As a result, links from valuable sources will be given more weight in the calculation of DA than links from lower quality sources. This update includes a better understanding and consideration for the quality of the sites linking to the site you’re researching, and links to a page that redirect to another page. If you’ve seen your DA decrease this indicates that the model determined that some of the links you have don't correspond with ranking well. Your best bet is to focus your link building efforts on relevant sites that are likely to send you traffic. You can dig deeper into the quality of the linking domains pointing to your site in the overview section of Link Explorer, and reviewing the distribution of your linking domains by DA. You can use the chart to compare your backlink profile to your competitors. Head to Link Explorer > enter your site > scroll down to the Linking Domains by DA graphic. ​In terms of improving your Domain Authority, with the information above in mind, it's best to look at both your on-page SEO to make sure you've covered the basics. Then you also want to look at your off-site SEO and building more links more links to your site. There are lots of different areas of Link Building to explore, from patching up broken links, to good ol' fashioned content creation. Here is a great video by our founder Rand which goes over some easy link building tactics to get you started. I hope this helps to further clarify!