What is domain authority?

Domain authority is a metric developed by Moz that predicts a site’s ranking potential based on its link profile. Domain authority is scored on a logarithmic scale from 1 to 100, with higher scores representing higher probabilities of ranking well. The scoring takes into account:

  • The number of linking root domains pointing to a site, as well as the quality of those domains
  • The number of total links pointing to a site
  • Various other ranking factors, based on machine learning

Websites with a large number of high-quality inbound links score high in domain authority, while websites with low link equity score low domain authority. New websites typically start with a domain authority of 1. 

How can I test my site's domain authority?

Moz free domain analysis toolYou can test your site’s domain authority by using Moz’s free domain analytics tool.

Example domain authority scores

Here are example domain authority scores of major websites based on September 2020 stats:

Domain Domain authority Number of linking root domains
en.wikipedia.org 98 5.5 million
instagram.com 93  
cnn.com 95 1.2 million

What is a good domain authority to target?

What counts as “good” domain authority will vary from industry to industry. Domain authority should always be used as a comparative score to benchmark your site against competitors in your field, rather than an absolute score to measure the efficacy of your SEO efforts. Algorithmic changes will affect domain authority scores over time.

How do I improve my site’s domain authority?

Developing a robust content strategy is the best way to improve your site’s domain authority. The publication of regular, high quality content will typically attract a steady stream of incoming links to your site from a variety of sources. These efforts can be supplemented by outreach, press, influencer marketing and social media marketing.