Excuse me asking, but what is a backlink?
A backlink is a link on a PR'ed site, say I added you to one of my PR6 pages (PR0-10), you would benefit VERY much from that, you can also sell PR links which is a nice little earner once you have your own PR, google toolbar has a PR checker installed
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Search Engine Optimisation, What is Pagerank? Google's Pagerank, needs to be understood by top web site designers who aim to promote and build a scalable, highly targeted web site using regular listings on search engines like Google. The distribution and navigation of your site, along with the web site architecture is important to correct and proper web sites.
Page rank is what google use amongst other things to identify your web sites value or importance. Google still use and constantly change/update or modify other varables that effect how a site is ranked on Search Engines.
Despite this some web sites hardly never lose position, what makes these sites different? Probably because the web site designers have designed the site around the many varables in use by Google. This is the only way to ensure long-term regular positions in competitive keyword markets. The other alternative is PPC the balance between the two ultimately comes down to cost and timescales.
Page rank is something that can change as new sites expand and more sites become visable to search engine robots. This is why search engine maintenance or search engine management (SEM) needs to be carried out to ensure maximum exposure is met each month on search engines. The algorithms are becoming constantly harder to crack and change all the time, sometimes these changes are minor sometimes they are major. If a site is built correctly and has a good SEM program it should be rated constanly in many cases.
Also many people confuse page ranking with tool bar ranking, the two sums are completely different. Page ranking is a mathimatical sum of your web site and could range well passed a 100 million in terms of a figure. Tool bar ranking summerises the scales into a fixed number between 1 and 10. Each link to a site from outside it's own domain is considered a back link, infact even local links to a page are considered a backlink.
How is PageRank Calculated?
The PR of a page is made up by the PR from the pages that point to it, Google actually say: PageRank or PR(A) can be calculated using a simple iterative algorithm, and corresponds to the principal eigenvector of the normalized link matrix of the web.
Pulled from;
Code:
http://www.adaptability.co.uk/what-is-pagerank.htm