1. Too much targeting of advertising makes it less valuable as it no longer provides the "signals" to consumers about a brand's willingness to spend on advertising. 2. Consumers are increasingly distrustful of and annoyed by targeted advertising, especially as they become more aware of how their data is tracked. 3. Advertisers must use a balanced approach of both broad "broadcast" advertising as well as targeted advertising tailored to different stages of consumer journeys, in order to maximize impact and maintain trust.