This podcast episode interviews a behavioral economist and a creative strategist about their book, "The Housefly Effect," which explores how small environmental factors influence behavior. The discussion covers seven marketing psychology principles, including scarcity (limited availability boosts sales), reciprocity (offering something increases customer loyalty), and framing (how information is presented affects perception). Specific examples like McDonald's McFlurry campaign and Uber's apology voucher strategy illustrate these principles. Listeners gain actionable marketing tips backed by research to improve sales and customer engagement.