The purpose of PageRank is the ability to weigh in the websites in the Google search engine based on “hyperlinked set documents.” PageRank’s actual computation algorithm is more complicated to solve so it has a different type of variation that relates to the Google search engine. The main usefulness of PageRank is to also view the importance of each website on the Google search engine. Users also have the power to decide which of the websites are considered valuable or useful by casting votes on them. A page which has “a value of 0 means that the page is not linked” which is stated on the Wikipedia article entry on PageRank itself. Obviously a web page containing the value 10 is very popular.
PageRank can also be upgraded for better “search engine optimization” purposes. But it comes at a price and it tends to be expensive as well. A flaw that occurred on PageRank was the famous Google Bomb. It refers to “the practices intended to influence the ranking of particular pages in results returned by the Google search engine” is the way it is explained in the Wikipedia article of the Google Bomb. Other search engines were copying this technique as well such as Yahoo, Alta Vista, and Hot Bot. Google Bombs were also tended to be used for political reasons as well. Another use for the Google Bomb is for commercial uses as well.
(Image courtesy of http://media.smashingmagazine.com)

I like how you are including links and images — what I wonder when I see this post, however, is: what’s the point? You basically give me some info on page ranks, which is interesting, but it leaves me wondering why you are writing on it? Has it been in the news? Is it changing? What is instigating this post?? In other words, contextualize more.