Page Rank is a link ranking algorithm measured between 0 10 introduced by Google Page rank is updated quarterly but has no specific date on update and as a result webmasters around the world are always patiently curious or inpatient to find out when their site will be updated. PR is also the way that Google measures the importance of a website. Page Rank is a numerical figure assigned by Google to express the importance, relevance and validity of a website based on the number of links pointing at the website.
But, pr in itself does not determine placement in the Search Engines, but is does effect overall Popularity and Traffic to a web site.Page rank is determined by links directing to a certain website.Page rank is not directly related to traffic.
Page rank can drop for a lot of reasons, many of them outside of your control. Page ranking of a website is a very important indicator to both webmasters and SEO specialists alike.Page rank is generally calculated by search engines by analyzing and calculating various back links pointing towards a particular website.