Improving Domain Authority (DA) means enhancing the overall trustworthiness and strength of your website in the eyes of search engines like Google. This is achieved by consistently producing high-quality, relevant content, earning authoritative backlinks from trusted websites, and ensuring your site has strong technical SEO like fast loading times, mobile responsiveness, and a secure (HTTPS) connection. DA is not an official Google ranking factor, but it serves as a good indicator of your website's potential to rank well in search results. The higher your DA, the more competitive your site becomes in your niche.