This chapter examines some of the most important areas of policy-making in the European Union. It first explains how EU policy-making differs from national policy-making before discussing the most important policies aimed at building the internal market and limiting its potentially negative impact on individuals, society, and the environment. The EU’s ‘market-building’ policies include competition policy, trade policy, and the Economic and Monetary Union (EMU), while ‘market-correcting’ and ‘cushioning’ policies include the common agricultural policy, the cohesion policy, and environmental and social regulation. The chapter shows how these policies are made and also why and how they matter. It also compares policy types in the EU.