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Now as an Internet marketing company we are constantly researching and consulting with different people companies and newsletters to make sure we are providing the best most reliable information to our readers so we have listed an article we found on site pro news written by Bob Wakfer that seems to be very well layed out. have a look below and learn how to get top Google ranking by understanding how page rank works.
SiteProNews: 06/21/04 Feature Article |
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HTML version available at: http://www.sitepronews.com/archives.html
Google Page Rank and How To Get It
by Bob Wakfer ?Copyright 2004
Page Rank: The Background
Google's Page Rank (PR) is one of the most sought after, and yet
misunderstood web page attributes. Page Rank, named after one of
the founders of the Google search engine, Larry Page, was the
innovative foundation that the Google search engine was built on.
The theory was that a link from one web page to a web page of
another site was in essence a vote for that page. The reasoning
was that webmasters would only link to pages that they thought
were interesting and of value to their viewers. Google used the
number of inbound links (IBL) to a page to judge the importance
and relevance of that page, and based on this calculation, and
other factors, decided where to place that page on the search
results page (SERP).
They devised a scale of measurement for Page Rank from 1 to 10.
Then for the information of webmasters and interested people
they produced a tool bar that can be deployed in Internet Explorer
that indicates the Page Rank value of any page being viewed in
the browser. These values have become known as PR0 to PR10.
Since PR values are a result of IBLs, Google decided to give
them their own name and refers to inbound links as back links.
As part of the tool bar there is a quick lookup of the number of
back links that Google reports for the page that is currently
being viewed in the browser. This search can also be done
without the aid of the tool bar by simply typing
"link:http://www.yourURL.com" into the Google search box.
The one trick to this link search is that Google does not
display all back links. At one time it was thought that they only
listed pages with a value of PR4 or greater. Today however, you
will find back links reported from pages of lower PR values. So,
at best, Google's back link search seems to present some sample
of pages linking to the site. Suffice it to say that this search
is not a reliable measure of all IBLs to a page.
How is Page Rank Calculated?
In simplest terms PR is calculated by the sharing of PR from
all the IBL links to your page. This is not strictly accurate
because Google also uses the internal links within a site in
the calculation of PR. Each link to a page carries with it and
passes PR value to the target page. The PR points or value
passed depend on the PR value of the page they come from, and
the total outbound links from the page. It is generally agreed
that a page will only pass about 85% of its value to the page it
links to. So a PR5 page with a single outbound link will pass
85% of the value of a PR5 page to the page it links to.
But virtually no page has only a single link -- remember
internal links are also used in the total outbound link
count -- so the value passed to any page is 85% of the PR,
divided by the total number of outbound links.
The question now becomes what is the PR point value of the
different PR levels. Most observers believe that the relationship
between PR levels is logarithmic rather than linear. In other
words PR5 is not worth 25% more than a PR4, but may be worth
4 to 6 times more.
It is also understood that a PR value is not a single number,
but is in fact a range of values. So not all PR6s are equal. As
the chart below shows a PR6 may be just on the upper boundary of
a PR5 or it may be just short of the entry point for a PR7.
The chart that follows shows the range for each PR value. It
also shows how much PR value or PR points a page with 50 outbound
links will pass depending on of its own PR rank. From this I have
calculated the number of links required from each value of
Page Rank necessary for a page to attain a desired page rank.
Here is a Page Rank Calculation Chart:
(http://www.sitepronews.com/pagerank.html).
The Assumptions And The Mathematics:
For those who are interested I have used logarithmic values of
base 5.5. In other words the value range for a PR1 lies between
5.5 to the power of 1 and 5.5 to the power of 1.99, and PR2 lies
between the value of 5.5 to the power of 2 and 5.5 to the power
of 2.99 etc. The rest of the chart is fairly straight forward.
It assumes that there are 50 links per page and that 85% of the
PR value is passed to the recipient page.
The number of links required to attain any ranking is based on
the median value of the donor page and the entry threshold of
the desired PR value. In other words to achieve a PR5 you need
5,033 points and the average points available from a PR6 page
with 50 links is 1507.
The chart was calculated with an Excel spreadsheet and it can
be downloaded if anyone wants to play with the calculations and
assumptions. It might be interesting to work with a different
base number for the logarithmic calculation. And it is also
interesting to see the impact of more or less outbound links
from a page.
Are These Findings Valid?
Nobody knows for sure how Google calculates PR. I have shown
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this chart to a number of knowledgeable people and they have all
agreed that my calculations look reasonable. One SEO guru from a
major firm said the results were very similar to independent
research that his firm had conducted.
So take it or leave it. It is probably a fair reflection of how
PR is passed and accumulated.
The lesson that can be drawn from this explanation and chart is
that if you want to increase your PR you need a few links from
pages with equivalent or higher PR, or a great many links from
sites with lower PR.
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Bob Wakfer is the owner of Computer Partners and a long time
student and practitioner of SEO. Computer Partners offers web
site design, hosting and search engine optimization for its
clients. If you would like to discuss any of these services
with Bob you can email him at bob@compar.com.
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Copyright ? 2004 Jayde Online, Inc. All Rights Reserved.
SiteProNews is a registered service mark of Jayde Online, Inc.
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