How frequently is PageRank updated and can it change quickly?
Google no longer uses the original PageRank algorithm, but linking still plays a large role in how Google ranks pages. There’s no real way to know how quickly Google’s evaluation of a page changes, since, as of 2016, Google no longer publicizes PageRank scores. If you’d like to keep track of your backlinks and other quality measures, you can use a third-party SEO tool.