So what is Google Page Rank and how does Google determine it? Well it has been reported
that Google has changed their page-ranking algorithm 450 times in just one year. So no one not even the Google Search engineers really know everything that is factored in to their Page Ranking algorithm. However, we do know that it is mostly determined by a popularity contest with values from 0-10 assigned with 10 being the highest rank achievable. Therefore, the web sites with the most votes get the highest rank. Votes for sites are in the form of links to a site. People create links to sites when they determine there is enough content value to warrant a link from their site. Therefore the sites with the most links receive higher value in Google’s eyes and therefore receive a higher page rank. Also the page rank of the site providing the link determines the value that Google gives a site receiving the link. The position a site is placed on a search results page is not determined by site page rank alone but is determined by the keyword strength of the site. Good keyword marketing tools and research are applied to assure good placement. However, some juice (strength) from page rank does appear to give some keyword search results better placement for a particular keyword search. There is much controversy concerning SEO (search engine optimization) strategies since nobody knows for sure how much juice is given for any particular parameter and therefore everyone does a lot of experimenting in hopes of finding better results. Good content always wins out because that is what people are looking for on the Internet and that is what ultimately determines the value or strength of a web site.
The Learn Internet Marketing Tools website has some addition information you might find useful.