Ethereum is a decentralized platform that runs smart contracts: applications that run exactly as programmed without any possibility of fraud or third party interference. Ethereum provides a new way to create and execute contracts and allows for more complex transactions than ever before. In addition, Ethereum enables developers to build and deploy decentralized applications. These apps can be used to manage finances, track assets, create markets, and more.
Ethereum node plays an important role in the Ethereum network by keeping track of transactions and blocks. Nodes also help to secure the network by validating and propagating transactions. Additionally, nodes can provide services such as decentralized storage and bandwidth sharing.