Page Authority (PA) is a ranking score between 1 to 100 which basically states how well a specific page will rank on the search engine result page (SERP). It uses data from the web index and dozen different factors to calculate the rank which registers as higher the score, greater is the rankability. PA uses a machine-learning algorithm to calculate the rank across the thousands of SERPs that we predict against. Page Authority was developed by Moz.
Following are some tools to check PA of any website:
- MozBar (Chrome Extension)
- Website Seo Checker (Online Tool)
- Small SEO Tool (Online Tool)