However, Mueller said that Google uses sitewide signals to look at a website’s overall quality to rank new pages. It’s not something where we would give you a score on authority and say this is the general score for authority on your website.”” John Mueller Google In general, Google doesn’t evaluate a site’s authority. SEMrush’s Authority Score uses machine learning to calculate a site’s quality, popularity, and backlink signals based on organic search data, traffic metrics, and backlink gains or losses. Domain Rating from AhrefsĪhrefs’ Domain Rating score calculates the strength of a given domain based on the quality and quantity of inbound links (backlinks) a website has and the quality of those external links.

Trust flow measures the degrees of separation between any given website and a site Majestic has designated as a “trusted seed site.” Citation Flow tries to predict how influential a URL is based on how many other sites link to it. Majestic’s Flow Metric score is a domain score that incorporates their Citation Flow and Trust Flow algorithms. This tool generates scores using machine learning to identify algorithms correlated with rankings across thousands of SERPs. Moz has also developed a Page Authority scoring system to “predict” how well specific pages will rank on search engines. They also explicitly state that DA isn’t a metric Google uses to rank websites. Moz’s tool allows businesses to check Domain Authority to “predict how likely a website is to rank on search engine result pages (SERPs).” Moz uses different factors to calculate this score based on a sample of links to a website or page.

Ahrefs website authority checker