With the internet and the aggregation of huge data sets, advertising is moving its focus from target groups to individual targets. Specialised companies are tracking your moves on the web to create highly detailed profiles of who you are, what you do, what you like so that advertisiers can tailor their ads specifically not only to you, but your current situation. You can hardly escape it, so it’s good to know how it works.

From Weekly Filet #55, in February 2012.