Google PageRank: Frequently Asked Questions - Does the number of links from a page make a difference?
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The total number of outbound links from a page makes a huge difference in the amount of PageRank transferred to each receiving page. A Web page with ten outbound links sends one tenth of the total available flow to the receiving page. A page linking to only one page sends all of the available PageRank transfer to the next Web page.
How does a page move higher from one PageRank level to the next?
PageRank is represented numerically from a low of PR0 to a rarely achieved high of PR10. PageRank is not a series of equal steps. It is logarithmic in its calculation. In the same way that the earthquake Richter scale is exponential in calculation, so too is the mathematics behind Google PageRank. It takes one step to move from a PR0 to a PR1, it takes a few more steps to PR3, it takes even more steps to PR4, and many more steps again to PR5, and so one. Each level is progressively harder to reach.
Does increasing the content change the Google PageRank?
Adding fresh content doesn’t provide a direct impact on Google PageRank. The transfer is entirely dependent upon inbound links to the page. On the other hand, providing interesting, informative and theme relevant content will attract many natural one way links to that page. A fresh infusion of PageRank arrives with each link.
How does theme relevance affect Google PageRank?
Theme relevance refers to how related to one another is the subject matter of two interlinked Web pages. If both pages discuss tigers, then they are highly theme relevant. It’s thought that Google may be implementing a system of Topic Sensitive PageRank, designed to pass along varying percentages of available PageRank based on theme relevance. The more closely related the pages, the higher the PageRank amount transferred.
Google Optimization 
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