Pagerank explained?

[Blazingpie]

http://pr.efactory.de/e-pagerank-algorithm.shtml

The original PageRank algorithm was described by Lawrence Page and Sergey Brin in several publications. It is given by

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

where
PR(A) is the PageRank of page A,
PR(Ti) is the PageRank of pages Ti which link to page A,
C(Ti) is the number of outbound links on page Ti and
d is a damping factor which can be set between 0 and 1.

So, first of all, we see that PageRank does not rank web sites as a whole, but is determined for each page individually. Further, the PageRank of page A is recursively defined by the PageRanks of those pages which link to page A.

Dunno if the info on this site is true, but it is rather interesting....

[Paz]

LOL... That lookes like a copy of Phil Craven's article.. He knows more about about Page Rank than Google do.

Yeah, if you read the article it shows how you can distribute pagerank around a site to flatten it or focus it, as necessary.

If you want practical examples of how you can distribute PR in larger sites, then here's a good'n:
http://www.seocompany.ca/pagerank/page-rank-explained.html

As you can see, it's important to consider how best to distribute PR in deep sites, such as online stores. If you can't be bothered to read it, just put a sitemap at the bottom of every page to flatten it all out and get some internal backlinks.... :o

I understand how vital it is to organise your internal linking properly, but I take it all with a pinch of salt these days.

Cheers,
Paz.

[Paz]

Actually, I have to take that back because I didn't notice it was in 10 parts. It's a very interesting read.

[shelly levin]

That equation is very interesting, as this formula shows that once your outbound links with respect to each inbound link's page rank reach a certain level, it does not make much difference whether there are 1 or 100 outbound links as the ratios become too small to make a significant difference. It is therefore better to have fewer high ranking sites with little or no outbound links as the hundreds of additional low ranking sites with plenty of outbound links will not make a significant difference to the overall page rank of the site you are working with.

Thus this equation is saying if all the sites linking to you have low rank and plenty of outbound links, selecting 20 or 300 will not make much of a difference to your sites page rank.

[Paz]

Thus this equation is saying if all the sites linking to you have low rank and plenty of outbound links, selecting 20 or 300 will not make much of a difference to your sites page rank.

Hi Shelley,

Yes it's true that lots of PR links won't do much for your Page Rank, but Page Rank is less important in ranking these days. However low PR links will pass anchor text eg blue widgets and you will rank higher for blue widgets if you have a bunch of them.

By all means get relevant high PR links whenever you can, but don't pass up the chance of a one way link because it has a low PR.

Cheers,
Paz.

[harsha]

thats very intresting man i never new this ,post in these forum are very good knowledge hub

[Jocelyn]

PR is good to get crawled. You can learn how to calculate it and all, if you have time to waste, but it won't bring you to the top on it's own. Loads of things affect the calculations and comparing sites with the same linking structure and incoming links shows that there is more than just a mathematical calculation to it. Been freaking on PR till the Florida update, then it's power was adjusted to make it harder for people with networks of sites to trick the system with links.

Get relevant links and good anchors pointing to your pages, stop worrying about PR and it's calculation...

[Blazingpie]

PR is good to get crawled. You can learn how to calculate it and all, if you have time to waste, but it won't bring you to the top on it's own. Loads of things affect the calculations and comparing sites with the same linking structure and incoming links shows that there is more than just a mathematical calculation to it. Been freaking on PR till the Florida update, then it's power was adjusted to make it harder for people with networks of sites to trick the system with links.

Get relevant links and good anchors pointing to your pages, stop worrying about PR and it's calculation...

well, the thing to remember is that the PR we see is only a snapshot. Google uses PR for their rankings, but its more of a floating point and is continously updated