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PR Expalined by OWG

Discussion in 'Search Engine Optimization' started by temi, Mar 10, 2006.

  1. temi

    temi Facilitator Webmaster

    Oh Dear, how can I explain this without a graph or flow chart I really must get around to placing this on my website

    Ok How can a deep page have a higher PR than the home page? Simple, it is ALL about link structure. Link structure (i prefer navigation structure as a phrase when talking about within a site). so lets go to the top.

    First off, understand that a page can vote (not transfer, as it votes and keeps PR) a page can vote, up to 85% of the value of its own Page rank (PR). This value is divided between the outbound links it has.

    So page 'A' is a pr4 page with 10 outbound links (assuming they are all internal links to the site because PR travels more freely within a domain than it does across the web). so 10 links divided by pr4 X 0.85 = a link value of 0.34Pr per link. Ok so there we have it.

    It links to every page on the site, as do all the others. so in a flat navigation structure like this, every page on the site will have the same PR (in theory).

    BUT, lets say that there is a page on the site that has a fantastic bit of content that many many people link to. This site <NB THIS SHOULD READ PAGE< NOT SITE sorry > will ALWAYS be AT LEAST 015% higher in PR than the rest of the site, as it can only vote 85% of its own PR out. Normally most people will link to the home page, but not always.

    Ok Another way to manipulate PR, and it is called daisychaning.

    Page A
    Page B
    Page C
    Page D

    Page a is a pr4 It has one link on it to page B which has one link on it to page C which has one link on it to page D.

    Every page in the site links to page a, b, c & d. They however only link to each other in daisy chain mode.

    So page a will pass ALL its available vote to page B (this will not be = to .85 however as other dampening factors will kick in due to the small amount of outbound links. But lets assume it passes say 10% This makes Page b PR$ +.10 of A = PR 4.4 this then passes 10% on to c making which passes on 10% onto d and so on, with the PR compunding along the daisy chain.

    The other way to do it (which is better although a waste of time as PR is a load of balls anyhow). is to have

    page a linking to B, C, D, E, F, G & H
    b linking to c,d,e,f,g,h,
    c linkng to d,e,f,g,h,
    and so on, This will allow more PR to flow out of the early pages, and along the daisy chain.

    I hope this has explained it better although somehow I doubt it
  2. Robster

    Robster Guest

    Also, if you have time to do some reading here is another longer explanation with diagrams which I found a while back and really cleared most of the confusion I had about page rank.

  3. OldWelshGuy

    OldWelshGuy New Member Webmaster

    Far too complicated for me LOL. Lord I am glad I was around to grow up with Google. I have said it before, but will say it again, I really would not want to be getting into SEO now, having to learn all that has gone before. It is a bloody nightmare.

    I have been so fortunate, to actually have been involved from day 1 and learning the stuff at the time as it happened rather than retrospectively.

    Nice link Robster.

    Oh & YMLAEN CYMRU ---- Let's shove it up them Italians today!
  4. temi

    temi Facilitator Webmaster

    Quite right OWG about the complexities of PR distributions on a site etc etc but I am really not sure you need that detailed knowledge to optimise and promote a site effectively.

    PS: Good luck against Italy :)
  5. that has happened to me occasionally, I really don't know google's algo though.
  6. OldWelshGuy

    OldWelshGuy New Member Webmaster

    Page rank is very little use for SEO, at least the PR value that is displayed on the toolbar.
  7. temi

    temi Facilitator Webmaster

    That is precisely my point OWG, PR is important to those who want to sell or trade links, if its traffic you are after, its SERP that counts
  8. etechsupport

    etechsupport Guest

    I think its also important to spread the PR of internal pages links by redirecting all non-www request to www preserving full path, and get insure all internal links point to www pages.
  9. OldWelshGuy

    OldWelshGuy New Member Webmaster

    Yes, it is important you handle this from day 1.

    The easiest way is DNS local bind, failing that on apache you need to get the mod rewrite rule applied in the .HTACCESS file

    Options +FollowSymLinks 
    RewriteEngine on 
    RewriteCond %{HTTP_HOST} ^yourdomain\.com 
    RewriteRule ^(.*)$ http://www.yourdomain.com/$1 [R=permanent,L]
    Slap that in there (or reverse it if you are using non www. pages as preference, and Bobs your uncle)

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