Hey everybody! It's Gregory from Dapp University. Today I'm going to show you how to build your first decentralized application, or dApp, on the Ethereum blockchain. I'll show you how to write your first Ethereum smart contract, how to write tests against the smart contract, and deploy it to the Ethereum blockchain. I'll show you how to develop a client-side application that interacts with the smart contract. I'll also answer key concepts like "What is a blockchain" and "How does a dApp work"?