An Ethereum mainnet is a public blockchain that runs the Ethereum protocol and enables decentralized applications (dApps) and smart contracts to be built and run on the Ethereum network. The mainnet is the original and most primary network for Ethereum.
It is also the most secure and reliable network for running Ethereum transactions. .
The mainnet is powered by a Proof-of-Work (PoW) consensus algorithm that allows for security and decentralization while also ensuring that all transactions are processed in a timely manner. The mainnet also has its own currency, called Ether (ETH), which is used to pay for transaction fees and gas costs associated with running decentralized applications on the network.
The mainnet launched on July 30, 2015, and has been running smoothly since then with only a few minor forks and upgrades. The mainnet is an essential part of the Ethereum ecosystem and provides the foundation for building decentralized applications that can change the world.