Chapter 1 sets the scene and introduces the debate on private competition law enforcement and the increased attention attributed to the ‘consumer interest’. The central tenet of this book is located at this juncture, as it explores the role of ‘consumer interest’ and consumer participation in EU competition law enforcement. The book focuses on private competition law enforcement and aims to examine the importance of ‘consumer interest’ in EU competition law with a view to reshaping the enforcement mechanisms in the competition law field. It discusses the justifications for more active consumer participation as well as the necessary remedial and procedural tools to facilitate such participation. The introductory chapter discusses the structure and methodology of the book and introduces the reader to the main research questions dealt with in the subsequent chapters.