Ethereum 2.0, also known as ETH 2.0 or Serenity, is the upcoming version of the Ethereum blockchain. It is designed to improve the scalability, security, and sustainability of the Ethereum network.

Some of the key features of Ethereum 2.0 include the use of proof-of-stake (PoS) instead of proof-of-work (PoW) for consensus, sharding to improve transaction throughput, and the implementation of new technologies such as the beacon chain and cross-shard communication.

Overall, Ethereum 2.0 is intended to make the Ethereum network more efficient and capable of handling a larger number of transactions, as well as to address some of the challenges facing the current version of the network.