Brief elaboration of them all to people in need. PA (Page Authority) - Is Moz's calculated metric for how well a given webpage is likely to rank in Googles results page. DA (Domain Authority) - Is Moz's best prediction for how a site will perform in search engine rankings. CF (Citation Flow) - Is weighed by the number citations to a given URL or Domain. mT (MozTrust) - Is similar to TrustRank and estimates the distance from trusted seeds, using PageRank like calculation. mR (MozRank) - Is a metric for link popularity score. TF (Trusted Flow) - Is weighed by the number of clicks from a seed set of trusted sites to a given URL or Domain. PA, DA, mR and mT are Moz's terms from their Open Site Explorer. PA and DA are scaled on a 100-point system, whereas mR and mT are a 10-point system. Obviously 0 being bad and 10/100 being great. DA and PA are easy metrics that I hope everyone on here understand. But mT and mR are not as common for a newbie to know about. mR is higher when the numbers of linkage and quality are high. mT is the link distance between site X to a trusted page that it links to. On Moz, they compare it to the six degrees of separation; where everyone in this world are 6 degrees from knowing everyone (so for the current readers who are reading this, I technically know you through a friend of a friend of a friend whos friends of a friend of yours...:bike. CF and TF are MajesticSEO, known as Flow Metrics, terms from their Site Explorer. But lets understand this a little bit more. Citation flow, as you can logically guess, is a prediction on how reliable your site is based on the number of sites linking to your site. Now comes Trust flow, where CF will be verified. TF is a number predicting how trustworthy a page is based on how trustworthy the sites that are linking to are. Values are from 0 - 100. 0 being bad to 100 being great. Hope some of yous found it useful.