The document outlines Fronteer Strategy's 'Treehouse' co-creation tool designed for brand development and innovation, allowing teams to explore ideas and create viable business models in two half-day sessions. It emphasizes the involvement of diverse experts and the structured process of preparation, co-creation, and analysis to yield presentable business models. Examples of successful co-creations, such as the 'de pauze' app, illustrate the effectiveness of their approach in engaging clients and generating fresh perspectives.