Decentralized apps, also known as dApps, are applications that run on a decentralized network, typically a blockchain. Unlike traditional apps that are hosted on centralized servers, dApps are built on blockchain platforms like Ethereum, where the code and data are distributed across multiple nodes. This decentralized nature brings several advantages, such as increased security, transparency, and censorship resistance.

dApps can be used for various purposes, including finance, gaming, social media, and more. They often utilize smart contracts, which are self-executing contracts with the terms of the agreement directly written into code. Smart contracts enable trustless and automated interactions between parties, eliminating the need for intermediaries.

One notable example of a dApp is Uniswap, a decentralized exchange that allows users to trade cryptocurrencies directly from their wallets. Another example is CryptoKitties, a game where users can collect, breed, and trade virtual cats using blockchain technology.

It's important to note that while dApps offer many benefits, they can also have limitations such as scalability issues and higher transaction costs due to gas fees. However, ongoing developments in blockchain technology aim to address these challenges and improve the overall user experience of decentralized applications.