The document discusses machine learning (ML) teams and roles. It provides an overview of common ML roles including ML product manager, DevOps engineer, data engineer, ML engineer, ML researcher/scientist, and data scientist. It describes the typical job functions, work products, and tools for each role. It also discusses how ML skills vary across roles and provides a visualization. Finally, it discusses different organizational structures for ML teams, including nascent/ad-hoc, ML R&D-focused, and embedded ML product structures.