The phrase is a bit ambiguous in this context. It could refer to a few different things, and I want to make sure I write the right essay for you. Did you mean:
A exploring the concept of how modern advertising and demographics "dream" about or curate the lives of consumers? Target Demographic - Dreaming About You
A of the "target demographic" for a product or brand titled "Dreaming About You" ? The phrase is a bit ambiguous in this context