Ethereum is a software platform for creating decentralized applications that work on blockchain technology. Blockchain is technology in which software, records, and contracts are run on a network of computers around the world, rather than a centralized server under the control of a single government or organization.
This video by Crypto Casey explains the benefits of blockchain and how Ethereum was created. Ethereum’s native token, Ether, is the second largest cryptocurrency after Bitcoin, although it serves a different purpose.