It's common knowledge that google's adwords tracking system follows readers from one Google ad powered site to another. What's particularly interesting is the TIME DURATION for the cookies. Here's one domain specialist's experience regarding big G's ad cookies:
Source:
http://www.utterdomain.com/2010/06/i...ggressive.html
Quote:
So apparently, Google, in its infinite wisdom decided to start using it's cookies to pull out my search history and to start showing me ads based on my previous searches rather than content on the page. No problem, right? Except it took a good two weeks before it pulled that particular trick out of the bag from when I had searched on that term and while I have the typical banner blindness that most internet users have developed, I can't recall ever having such blatant use of cookies to feed ads regardless of the page's content.
In yet another coincidence, the Federal Government released new guidance that essentially removes the Federal Ban on Persistent Cookies as well as providing additional guidance for use of sites like Facebook and Twitter. You can see the full details at Federal Computer Weekly. Why are the two related? Because just as the federal government was getting comfortable with putting their foot back in the water of using helpful technologies like persistent cookies, Google may very well be screwing it up in order to make a few more pennies per page (times billions of pages!)
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