Google rewards its authority and trusted websites with Pagerank, the higher the PageRank the higher its authority. Thus, backlinks that come from a domain with high Pagerank also, of course, have a better quality than the backlinks from sites with low PR, PR0 or PR N / A. Since PageRank has not updated since 2012, the Authority web appraisal can use the DA PA alternative (Domain Authority and Page Authority) from Moz. Metric TF (Trust Flow) from Majestic SEO can also be used. Benchmark values ??used Moz and the Majestic algorithm is in measuring the authority of a web remains the same, the higher the value the better.