Ethereum 2.0 (Eth2) Transition:
Ethereum is currently undergoing an upgrade to Ethereum 2.0, aiming to improve the network in three major areas: scalability, security, and sustainability. The most significant change is the transition from Proof-of-Work (PoW) to Proof-of-Stake (PoS).

Sharding:

Sharding is a technique where the Ethereum network is split into smaller pieces, called shards, to allow parallel transaction processing. This helps reduce congestion and enables Ethereum to handle much more traffic without compromising speed or cost.