Pete Jenkins is an expert in gamification, serving as founder of Gamification+ Ltd and holding various influential roles including entrepreneur in residence at the University of Brighton and chair of the Gamification Europe Conference. The document outlines key concepts related to the player journey in gamification, including stages like discovery, onboarding, scaffolding, and mastery, as well as the emotions and game elements associated with each phase. It also discusses communication strategies to enhance player engagement throughout the journey.