Domain Authority is a specific “trust-like” metric developed by Moz.  The higher the number (on a scale from 0-100), the more “trustworthy” the site is deemed to be. But if you diligently practice white hat SEO tactics you should improve the entire optimization level of your website which should increase your Domain Authority and other key “trust” metrics. 

  • Provide high quality content on each page intended for a human to read
  • Optimize each page so that spiders clearly understand what that page “should” rank for
  • Promote your content to the people who will value it
  • Provide high-quality outbound links that support the user experience
  • Make sure your site loads quickly
  • Make sure that your site is secure and not infected with malware
  • Remove spammy links and strive for a natural link profile
  • Obtain links from sites with high Domain Authority which are typically more valuable than links from sites with low Domain Authority
  • Remove significant HTML errors
  • Monitor your website in Google Webmaster Tools and fix errors

If you consistently practice white hat SEO tactics you should improve the entire optimization level of your website which should increase your Domain Authority and other key “trust” metrics.