Ah, clicking on it I get here:
Your Current Advertising Preference: Personalize Ads from Amazon
What are personalized ads? Personalized ads, sometimes referred to as targeted or interest-based ads, are based on information about you, such as the products you view on Amazon.com, your purchases on Amazon.com, visits to websites where we provide ads or content, or use of payment services like Checkout by Amazon on other websites. You can set your preference for ads personalized by Amazon here, or visit our Interest-Based-Ads page to learn more.
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So, I can opt out of it and will! No personalized ads for me!
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I close and go back to the page and a couple of other ads pop up, I bite and wind up configuring my "behavioral advertizing" for Google, turning off everything. Get bizarre messages about my internet connection being slow, can't turn them all off, and I manually turn off the rest. Never seen this stuff before. The page is http://www.youronlinechoices.com/uk/your-ad-choices