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Thursday, March 8, 2007

What is Page Rank | How Does A Page Rank WorK | What determines Page rank

How does PageRank work?

PageRank is passed through links. Each page only has so much PageRank which it can pass to other web documents. A dampening factor (approximately 85%) is set to allow the current pages PageRank to propagate through the rest of the web, while preventing all we pages from being ranked at a 10 or a 0.

The off going PageRank is split up between all links on that page (including links to other pages within that site). Therefore a PR 5 link on a page with 10 links is worth way more than a couple PR 5 link on a page with 100 links. One PR 8 link may be worth more than a thousand PR 3 links.

The value of any given link is hard to determine exactly. Generally though less links on a page means that more of that pages PageRank will be parsed out to your site. Also the higher the PageRank of a page the more PageRank it can pass on to other pages.

A page does not lose PageRank by linking out to other sites (unless it links out to penalized sites), it just has less PageRank to share amongst the other documents it is linking to.

What is Page Rank | What is Google Page Rank | Does Google Page Rak Is Important

What is Google page rank?

Google page rank is a ranking system which ranks individual documents based on their empirical placement in the web. page rank is the estimation that a random web surfer would cross a page.

When a page links to your page it is viewed as an independent vote of quality for your page by that person. Google is on a continual rolling update of the web, ranking the entire web in this manner. Many inbound links on are to home pages. The closer your page is to the home page (fewer links away), the more important that document must be to your web site.

If you have a great idea within your site it is possible that the page which that great idea is on will have greater link popularity (and thus more PageRank) than your home page.

Page Rank Calculation | Google Page Rank Formula | Formula Of Google Page Rank

Google Page Rank Calculation

What is the page rank calculation?

PR(A) = (1-d) + d (PR(T1)/C(T1) + ... + PR(Tn)/C(Tn))

PR= page rank
d= dampening factor (~0.85)
c = number of links on the page
PR(T1)/C(T1) = page rank of page 1 divided by the total number of links on page 1, (transferred page rank)

In text: for any given page A the PageRank PR(A) is equal to the sum of the parsed partial PageRank given from each page pointing at it multiplied by the dampening factor plus one minus the dampening factor.