The Merge represents the joining of the existing execution layer of Ethereum (the Mainnet we use today) with its new proof-of-stake consensus layer, the Beacon Chain. It eliminates the need for energy-intensive mining and instead secures the network using staked ETH. A truly exciting step in realizing the Ethereum vision – more scalability, security, and sustainability.

It's important to remember that initially, the Beacon Chain shipped separately from Mainnet. Ethereum Mainnet - with all it's accounts, balances, smart contracts, and blockchain state - continues to be secured by proof-of-work, even while the Beacon Chain runs in parallel using proof-of-stake. The approaching Merge is when these two systems finally come together, and proof-of-work is replaced permanently by proof-of-stake.

The Merge represents the joining of the existing execution layer of Ethereum (the Mainnet we use today) with its new proof-of-stake consensus layer, the Beacon Chain. It eliminates the need for energy-intensive mining and instead secures the network using staked ETH. A truly exciting step in realizing the Ethereum vision – more scalability, security, and sustainability.

It's important to remember that initially, the Beacon Chain shipped separately from Mainnet. Ethereum Mainnet - with all it's accounts, balances, smart contracts, and blockchain state - continues to be secured by proof-of-work, even while the Beacon Chain runs in parallel using proof-of-stake. The approaching Merge is when these two systems finally come together, and proof-of-work is replaced permanently by proof-of-stake.