What is Google Page Rank?

The co-founders of Google, Larry Page and Sergey Brin, describe Google Page Rank as a tool designed to rank a website that is listed in the Google search index. A Pagerank of a web page is given on a scale of 0-10. 0 is the lowest possible score for a website and conversely a 10 is the highest score possible. A high Pagerank is defined by the amount, importance(PageRank) and relevance of web pages that link to the web page in question. When a web page links to another web page, Google consider that to be a vote for the page in question and therefore of some importance. There is a formula associated to how PageRank is calculated but for the purposes of this article it is too indepth, but if you are interested in the theory behind PageRank (PR) then a quick search on Google will provide fruitful.

PageRank is Google's way of deciding a page's importance. It matters because it is one of the factors that determines a page's ranking in the search results. It isn't the only factor that Google uses to rank pages, but it is an important one.

How is PageRank calculated?

To calculate the PageRank for a page, all of its inbound links are taken into account. These are links from within the site and links from outside the site.

PR(A) = (1-d) + d(PR(t1)/C(t1) + ... + PR(tn)/C(tn))

That's the equation that calculates a page's PageRank. It's the original one that was published when PageRank was being developed, and it is probable that Google uses a variation of it but they aren't telling us what it is. It doesn't matter though, as this equation is good enough.

In the equation 't1 - tn' are pages linking to page A, 'C' is the number of outbound links that a page has and 'd' is a damping factor, usually set to 0.85.

We can think of it in a simpler way:-

a page's PageRank = 0.15 + 0.85 * (a "share" of the PageRank of every page that links to it)

"share" = the linking page's PageRank divided by the number of outbound links on the page.

Google Page Rank | Lead Generation Services