What does Domain Authority (DA) measure?

Domain Authority (DA) is a metric developed by Moz that predicts how well a website is likely to rank on search engine results pages (SERPs). It is based on a score that ranges from 1 to 100, where higher scores indicate a greater ability to achieve higher rankings. This score is calculated using various factors, including the number and quality of backlinks, as well as other relevancy scores that influence search engine algorithms.

By measuring a website's ranking potential, DA helps marketers and SEO professionals gauge a site's strength compared to competitors. This makes it a vital tool for those looking to enhance their SEO strategies, as understanding DA can inform decisions around link-building, content strategy, and overall website performance.

The other options focus on attributes that do not directly relate to ranking potential. While the quality of website design can affect user experience and engagement, it does not affect DA. The age of a domain name can play a role in overall trust and authority, but it's not a direct measure of the site's ranking potential. Finally, the number of pages on a website, while it may contribute to content richness, does not necessarily correlate with the website's ability to rank effectively on search engines.