$ETH Blocks in $ETH are data containers containing information about transactions, network status, and metadata. Each block includes a header, a list of transactions, and additional information such as the hash of the previous block, a timestamp, and mining difficulty. Blocks are linked in a chain (blockchain) using cryptographic hashes, ensuring the security and immutability of the data.

A block is created approximately every 12 seconds. Miners (or validators in Ethereum 2.0) verify transactions and add them to a new block. Once confirmed, the block becomes part of the blockchain. Ethereum uses a Proof-of-Stake (PoS) mechanism, which replaced Proof-of-Work (PoW), reducing energy consumption and increasing network efficiency.