Decentralized Applications, commonly referred to as DApps, are computer applications that operate on decentralized blockchain networks. DApps use smart contracts to automate their operation, and their data is stored on a distributed ledger, making them decentralized and transparent. Unlike traditional applications, DApps operate on a peer-to-peer network, allowing for greater security and transparency. Some popular examples of DApps include decentralized exchanges, games, and social media platforms.
Source: https://blockgeeks.com/guides/decentralized-applications-dapps/