What is google PageRank (PR)

A Google feature that helps determine the rank of a site in our search results. PageRank relies on the uniquely democratic nature of the web by using its vast link structure as an indicator of an individual page's value. Important, high-quality sites receive a higher PageRank, which Google remembers each time it conducts a search. Google combines PageRank with sophisticated text-matching techniques to find pages that are both important and relevant to your searches


Goole RageRank (PR) Formula

PageRank is a probability distribution used to represent the likelihood that a person randomly clicking on links will arrive at any particular page. PageRank can be calculated for any-size collection of documents. It is assumed in several research papers that the distribution is evenly divided between all documents in the collection at the beginning of the computational process. The PageRank computations require several passes, called "iterations", through the collection to adjust approximate PageRank values to more closely reflect the theoretical true value.

A probability is expressed as a numeric value between 0 and 1. A 0.5 probability is commonly expressed as a "50% chance" of something happening. Hence, a PageRank of 0.5 means there is a 50% chance that a person clicking on a random link will be directed to the document with the 0.5 PageRan