Why? – Page Rank

Friday, February 12th, 2010 at 8:40 am

What is Page Rank ?

Briefly Page Rank may be a “vote”, by all the opposite pages on the Web, concerning how important a page is. A link to a page counts as a vote of support. If there’s no link there’s no support (however it’s an abstention from voting rather than a vote against the page).

How is Page Rank Used?

Page Rank is one in every of the strategies Google uses to work out a page’s relevance or importance. It’s only one half of the story when it comes to the Google listing, however the opposite aspects are mentioned elsewhere (and are ever changing) and Page Rank is attention-grabbing enough to deserve a paper of its own.

Page Rank is also displayed on the toolbar of your browser if you’ve put in the Google toolbar (http://toolbar.google.com/). However the Toolbar Page Rank solely goes from 0 – ten and seems to be one thing like a logarithmic scale:

Toolbar Page Rank:

(log base 10)   Real Page Rank
0                                            zero – ten
one                                          a hundred – 1,000
two                                        1,000 – 10,000
3                                       10,000 – a hundred,000
4                                          and thus on…

We have a tendency to can’t recognize the precise details of the size because, as we’ll see later, the utmost PR of all pages on the web changes each month when Google will its re-indexing! If we have a tendency to presume the dimensions is logarithmic (though there is only anecdotal proof for this at the time of writing) then Google could simply provide the best actual PR page a toolbar PR of ten and scale the rest appropriately.

Additionally the toolbar typically guesses! The toolbar typically proved a Toolbar PR for pages I’ve solely simply uploaded and can’t possibly be in the index nevertheless!

What looks to be happening is {that the} toolbar appearance at the URL of the page the browser is displaying and strips off everything down the last “/” (i.e. it goes to the “parent” page in URL terms). If Google has a Toolbar PR for that parent then it subtracts 1 and shows that because the Toolbar PR for this page. If there’s no PR for the parent it goes to the parent’s page, however subtracting a pair of, and thus on all the approach up to the basis of your site. If it cannot find a Toolbar PR to display during this way, that is if it doesn’t find a page with a true calculated PR, then the bar is greyed out.

Note that if the Toolbar is guessing during this approach, the Actual PR of the page is zero – though its PR can be calculated shortly after the Google spider initial sees it.

PageRank says nothing concerning the content or size of a page, the language it’s written in, or the text utilized in the anchor of a link!

Definitions

I’ve started to use some technical terms and shorthand during this paper. Currently’s as smart a time as any to define all the terms I am going to use:

PR: Shorthand for PageRank: the particular, real, page rank for every page as calculated by Google. As we’ll see later this can range from 0.15 to billions.

Toolbar PR: The PageRank displayed in the Google toolbar in your browser. This ranges from zero to 10.

Backlink: If page A links out to page B, then page B is claimed to have a “backlink” from page A.

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