When I first saw this, Evogear had(has?) an ad in upper left.
CAUTION: VERY GRAPHIC site (Mexican drug wars....)
Figured I would say something but, .... its most likely Google advertising. I don't know the details in exactly how it works, but it goes something like this:
-Google tracks what websites you go to.
-Companies pay Google to advertise, and Google gets space on webpages via hosting or something (I don't know exactly how that part works).
-If you visit a webpage which pays Google to advertise, Google remembers it.
-When you visit a completely different page later, and their is a Google advertising space, an advertisement for the site you visited earlier will pop up.
Which is why you get advertisements for completely unrelated things on webpages.
Atleast this is how it was explained to me.
grandprixone, summed it up pretty well.
It's not just Google doing this -- its all the major players these days.
Example: You go to Evogear or another outdoor website, cookie is placed by the ad company. Later when you are on another website that the ad company has space on, then the cookie will be read and Evogear ads will be displayed. You can opt-out here: http://www.networkadvertising.org/managing/opt_out.asp
More Information: http://en.wikipedia.org/wiki/Behavioral_targeting
Aug 13, 2010
The Wall Street Journal had an article recently on internet tracking/spying. It suggest two browser add-ons (a) Ghoster for Firefox and Internet Explorer (b) BetterPrivacy for Firefox only. In the article, several methods of the Internet version of "do not call" was also reported on. However, these "do not call" add-ons add their own cookies, so every time you clear your web browser of cookies, you have to "re-register" again. Sounds kind of fishy. I'm pasting the relevant website as follows:
Thought I could add a bit more to what CharlieP said. There are search engines which will search Google, Yahoo, etc etc using a proxy server for your search. IE you get the results from Google, but Google never sees your IP Address and you don't get the Google cookies loaded onto your computer. ixquick.com is one of the search engines I have heard of for this.
I have a Google email account... so I suppose I am at thier mercy as it is, and changing my search engine won't matter!
I may have to try one of those Ghost programs.