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Google Pagerank
Pagerank is more than obtaining links to your site. It is not just a case of obtaining every link from every site you know about. Relevancy and the number of outbound links a site has is a big factor in the processes google uses to allocate PR transferral. In this article we explain the ins and outs of Maximising Google PR.
Google Pagerank is a measurement of the importance of a site. A pagerank of 1 represents a site of less importance than a site with a PR of say 7+. This not only represents a sites popularity, but also is a huge factor in getting top rankings in google. It is proven that the majority of top 10 placings for very competitive keywords are all sites with good to very good PR.
So its simply a case of getting inbound links?? NO. It can be argued that every inbound link helps, but this is not the case for google PR. Google takes into account relevancy of a page linking to you, and also the number of outbound links a given site has. Lets use a couple of examples.
Lets say you obtain a link from a PR5 page with 60 outbound links on it, and then you obtain a link from a pr3 site, with only 10 outbound links on it. Which will give your site the most PR transferral??
So how is this calculated you ask? Well, it is simply a case of plugging in numbers. The following equation is used to calculate the PR transferral from a page linking to a site.
PR(X)=(1-d)+(d x PR of inbound link/Outbound Links on that site.
Note that d is called the damping factor. This is a value of approx. 0.85 .
So lets put this into our example.
PR transferral from a pr5 with 60 outbound links would be
PR(X)=(1-.85) + (.85x (5/60)) = 0.221 PR Transferral
PR transferral from a pr3 with 10 outbound links would be
PR(X)=(1-.85) + (.85x (3/10)) = 0.405 PR Transferral
As you can see there is a clear connection between outbound links and PR transferral. It is important to target pages with minimal outbound links. Say we took the extreme case of getting your link on a pr10 home page with the only outbound link being to your site.
PR(X)=(1-.85) + (.85x (10/1)) = 8.65 PR Transferral
This would be very handy in getting good PR and top search engine results.