Fellow is a marketing agency that focuses on promoting human wellbeing by connecting people with organizations that can help them live happier, healthier lives. The document discusses Fellow's quarterly marketing surgery which covers defining audiences, positioning organizations, and developing offerings. It emphasizes the importance of market segmentation, targeting, and positioning as the foundation of effective marketing. Fellow helps clients define their audiences and market segments, position their brand, and develop offerings through building engagement among non-customers, fans, and superfans.