This tutorial provides a concise explanation of decentralized applications (dApps) and their pivotal role in the Celo ecosystem. It explores the fundamental concept of dApps and how they differ from traditional centralized applications. The tutorial delves into the key characteristics that make dApps decentralized, such as their reliance on blockchain technology and smart contracts. Furthermore, it highlights the significance of dApps within the Celo ecosystem, showcasing their ability to enable secure, transparent, and inclusive financial services and applications. By understanding the role of dApps in the Celo ecosystem, learners will gain insights into the transformative potential of decentralized technologies.