This rating is extremely valuable when comparing websites or monitoring the "ranking power" of a website eventually. Domain Authority is a proprietory concept introduced by Moz soon after Google shutdown the Web page Rank (PR) service but of-program it isn't a metric utilized by Google in figuring out search rankings https://www.evernote.com/shard/s356/sh/55ba302d-3ad9-293d-cb48-4128e5e4280f/a5DEJoFwVQx3HoQT5rQ001SeDILmbBr0tcQIZcyo04J8lDaI-fqFC_knZQ