This sounded good to me on paper, so years ago I turned ad personalization back on for a while. At the time I was checking Pebble's site on a daily basis becaus

This sounded good to me on paper, so years ago I turned ad personalization back on for a while. At the time I was checking Pebble's site on a daily basis because they had short-term sales not announced anywhere. AdSense then proceeded to push just that one "Pebble Smartwatch" ad on me, everywhere. Even a page with multiple ad blocks just had several of them -- sometimes all of them -- the same text ad for Pebble. It became more annoying than helpful because I was already going to buy one, it just tried to push me to buy it for a higher price. I turned ad personalization off again and now any ads I get are mostly just related to the current page's content.