DApps, or decentralized applications, are software programs that run on a blockchain network rather than a single server. This means they are not controlled by any single entity, making them more secure and resistant to censorship. Users interact with DApps through smart contracts, which are self-executing agreements coded into the blockchain. DApps can serve various purposes, including finance, gaming, and social networking. They often use cryptocurrencies, like Bitcoin or Ethereum, for transactions. By leveraging the transparency and security of blockchain technology, DApps aim to provide users with more control over their data and digital interactions.