In my case Google know even more than that. With my use of Android they know where I work, where I do my shopping, what time I get up and go to bed, how much ti

In my case Google know even more than that. With my use of Android they know where I work, where I do my shopping, what time I get up and go to bed, how much time I spend at the gym. In short, they could have a hugely detailed profile on me. Yet like you I find their ads not particularly targeted. (This is odd, but as a Google shareholder I'm glad there is a lot more room to improve)