Just wondering how adsense figure out what ad to show? I assume they track what sites you visit and what you search for, etc. I've noticed over the past few days ads for a camera i've been looking to buy (i've been searching for good deals on it, the sites i've seen these ads on have nothing to do with cameras), so this is why i'm assuming they track not only just the site the ad is displayed on, but the user as well. Anything else they use to determine what to show? It's not really important, i'm just interested, thats all. Thanks, TS