A dApp (decentralized application) is a software application that runs on a blockchain network rather than a centralized server. It leverages smart contracts to execute functions and store data in a decentralized manner, ensuring transparency, security, and user control. Unlike traditional apps, dApps are immune to single points of failure, offering users more privacy and autonomy. dApp developers focus on creating these applications using blockchain technology, with a focus on scalability and decentralization.