The document discusses channel attribution models for measuring the effectiveness of different marketing channels. It notes the challenges of attribution across online and offline channels from data being siloed and a lack of single source of truth. It advocates that attribution models need to consider the consumer purchase journey and lifecycle, capabilities for tracking and analytics, and differ for acquisition versus retention business models. A real-world example shows how a "last click" attribution model is flawed for high consideration purchases where each channel has influencing roles.