Google PageRanks considered subtle
I did not know my Google PageRank until Phil mentioned it to me a while back. Apparently it's like the Richter (not Jeffrey Richter) scale in that a Page Rank of 6 is 10 times "better" than a Page Rank of 5, if I understand correctly.
Someone approached me to do advertising on the site, and since the bandwidth bill is due, I quoted a price I though was reasonable. She said, "but you only have a Page Rank of 5." This, for a moment, I become aware of this number since this advertiser cared.
I looked in the Google Toolbar and saw this:
Ok, looks like my Page Rank is 5, seems reasonable. However, later I noticed that if I was at http://www.hanselman.com/blog/ (note the lack of default.aspx) the Page Rank was 6. Seems like even though the home page is the home page, if there's a default.aspx at the end, that's a less "powerful" page.
I can only assume that more folks link to http://www.hanselman.com/blog than to the page with default.aspx. Apparently 10 times more, which seems reasonable.
I mentioned this to Phil who said, "weird, let me try" and sent me this screenshot where his Toolbar says my page is a 7. If I understand it, that's 100 times more shiny than a 5. Or, just +2. Who knows.
if Google's PageRank system is this subtle, and URIs aren't well canonicalized in their system then what's the point, Dear Reader? I know not. Seems like voodoo to me.
UPDATE: This post on the WebMaster group in response to another user says:
The page rank you see is not the pagerank Google uses.
- The pagerank you see is exported 3-4x/year
- It is "guessed" at whenever the page did not have a pagerank back
then. So if you have a "toolbar pagerank" (the one you see) TBPR 3 for
your homepage, and add a new sub-page, it will guess your sub-page to
be (perhaps) PR2, even though it doesn't have a real value for it yet.- It is page-based ("page" rank :-)), not domain / site based
- Your sites internal interlinking structures determine how pagerank is
distributed among the pages - in the simplistic example where you have
a single page with is fed with pagerank (from the outside), you could
determine how that pagerank is spread among your pages based on the
link-structure in your site. You'll likely just give up if you have
more than 5 pages though :-) - it's not worth it.- Your example with the homepage with a high PR and the other pages
having lower PR is perfectly normal and could be a "steady state"
Interesting stuff.
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Ed
Just a thought,
Brad.
Default.aspx is another reason to consider URL rewriting. A few of my rewrite rules relative to PR:
- I don't allow links to come in as codinghorror.com, I add the www. if it is not there. (un-thanks to Phil Haack!)
- I remove index.html if it is present
Consistency is the name of the game. Never have more than one "name" for a URL.
JeffA - I added this file with ISAPI_REWRITE, and it seems to have canonicalized my default page.
[ISAPI_Rewrite]
RewriteRule /blog/default\.aspx http\://www.hanselman.com/blog/ [I,RP]
RewriteCond Host: ^hanselman\.com
RewriteRule (.*) http\://www.hanselman.com$1 [I,RP]
RewriteCond Host: ^computerzen\.com
RewriteRule (.*) http\://www.hanselman.com$1 [I,RP]
It's another high score table.
http://www.codinghorror.com/blog/archives/000717.html
But this one is different because a higher value means more real world money. Not that I care, because I won't ever run ads.
Comments are closed.
I found a similar situation with Technorati where they have two blogs for me one at http://blogs.sqlxml.org/bryantlikes and another at http://blogs.sqlxml.org/bryantlikes/default.aspx. They each have seperate ratings and posts show up differently between the two of them. I've contacted them about it but got no response.
Seems strange that companies tracking things like this don't pay more attention to default.aspx!