The print advert, radio advert, and documentary about obsessions provide key information to viewers. They each display the title "Obsession" in red and include dates, times, and the channel to inform viewers about the program. Both the radio and documentary utilize matching music and the tagline "What's yours?" to connect the pieces. The print advert depicts a man surrounded by his various obsessions, while the radio advert shares clips from interviews to intrigue viewers. Overall, they effectively promote the documentary and give viewers a sense of what to expect through their consistent branding and sharing of relevant details.