The document discusses growing public concern about media agencies, data companies, and marketers tracking consumers' online behaviors to label them with personal characteristics and target ads. This allows for social discrimination and a lack of transparency that people find "creepy". While it benefits media buyers in the short term, it risks mounting public cynicism towards media and advertising in the long run. The industry provides poor explanations and its language makes the system harder to understand, but greater transparency about targeting is needed to address these problems.