What is the difference between Page Rank and Page Authority?
Google PageRank was an algorithm created by Google founder Larry Page. It’s a measurement of links and link equity.
Page Authority is a metric created by Moz.com. SEOmoz Page Authority predicts the ability for a specific page to rank in search engines and is more accurate indication of the value of the site.
SEOmoz Page Authority and Google PageRank are both valuable metrics in determining link popularity.
Google PageRank was one of the most misunderstood and misused Web analytics metric. PageRank used to reflects the importance of web pages. In the past, PageRank was updated approximately quarterly. Google PageRank was on a scale of 1-10. Thus, if a Website had a PageRank (PR) of 4, it required significant enhancements to link popularity to move to PR 5, making progress hard to measure. Anyways, Google PageRank is now obsolete.
SEOmoz Page Authority is more useful in many respects as a numeric metric for evaluating a page on the Web. Page Authority's 1-100 scale provides much finer gradations in comparison to Google PageRank scale of 1-10.