Electronic Sports, known as “Esports”, has grown into a unique and independent industry. Often compared to traditional sports, Esports has gained visibility as a specific discipline promoted by its actors and influencers. Despite some lingering misconceptions, Esports is a dynamic market full of passion, ambition, and business opportunities. Newzoo’s 2021 Global Esports and Live Streaming Market Report highlights that Esports revenues worldwide will surpass $1.08 billion in 2021, with a 14.5% increase from 2020. Moreover, 465.1 million people watch Esports, marking a 6.7% year-on-year increase. This course aims to provide a comprehensive understanding of Esports, from its historical background to the current ecosystem and future challenges.