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Wednesday, March 11, 2009

Google knows where you surfed last summer

Are those search ads starting to look a little too personal? Welcome to Google's new behavioral ad strategy. Better keep your nose clean


Google knows who you are. It knows what you search for. It knows what you had for dinner last night and exactly where you like your back to be scratched (there, just between the shoulder blades, up and to the left -- ahhhhhhhhhhh). And, starting today, it will deliver ads tailored directly to you

the ads Google displays won't just pull from the search terms you're using. Google will also look at all the sites you've visited lately. So if you're searching for, say, "baby wipes" and all you see are ads for porn, Google knows you've been a naughty little monkey.

The concept isn't new; behavioral ad companies were all the rage a few years ago, which is why AOL, Microsoft, and Yahoo all bought one of their very own. But Google is the proverbial 8,000-pound gorilla -- when it does something, there's usually a boatload of banana peels to slip on.
There are limits, of course.


Google associates the ads to a cookie in your browser, not your identity; so it will know about the naughtiness, but won't know which monkey is responsible. If you don't like the idea of Google delivering ads based on your surfing habits -- or you want it to know some of your interests, but not all of them -- you can change the settings in Google's Ads Preferences Manager.

You can also opt out entirely, and install a plug-in for IE or Firefox that maintains your opt-out choice even when you nuke all your other cookies.

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