Domain Authority is the overall weight of a domain as a whole. A website with high domain authority would have a backlink profile with links from a wide array of authoritative sources such as governmental and educational institutions. It would also likely have several years of history. Over the years, as search engines have moved from subdomain ranking factors to page level ranking factors, domain authority has been perceived with increased importance.
Majestic and Moz offer tools with similar domain-related metrics. Moz’s Domain Authority, or DA, metric measures the likelihood that a site will rank higher than competing sites in search engine results. A site’s Domain Authority is determined using a number of factors, including how many authoritative sites are linking to the site. Moz Domain Authority is measured on a scale of 0 to 100. Majestic offers domain level Flow Metrics comprised of Trust Flow and Citation Flow, which provide domain level metrics.