PageRank is a trademark of Google. It is a link analysis algorithm used by Google to rank web documents. The process of PageRank has been patented by Stanford University and the Google has exclusive license rights on the patent from Stanford University. Stanford university received 1.8 million shares of Google in exchange for use of the patent; the shares were sold in 2005 for $336 million.
PageRank is based on giving importance to the web links. Links can be internal of external. Whenever another web document link to a particle article on the website the overall rank of the website increases. PageRank also increases with increasing the number of pages in the website.
Although PageRank is on of the most important criteria to enhance the appearance of the particular content on Google searches. Google also use many other methods for this purpose. Many of these methods are trade secret and not in the knowledge of public.
The rank value points towards the importance of a particular page. Whenever a hyperlink points towards the page, it is considered as vote of support. Incoming links are very important. A page that is linked to many pages of high PageRand automatically gain the higer learning. The websites exchanging links with each other given less weightage compared to one-way links. However it is better than no link. To read more on this click on improve your PageRank by every possible way.
Source: Article first published in Blogger’s Magazine.