Geth (Go Ethereum) is the official Go implementation of the Ethereum protocol, maintained by the Ethereum Foundation. As one of the most widely used Ethereum clients, Geth allows users to run a full Ethereum node, enabling them to mine Ether, deploy and interact with smart contracts, and participate directly in the peer-to-peer Ethereum network. It plays a critical role in supporting the decentralization, security, and integrity of the Ethereum blockchain.

Geth offers a robust and flexible set of tools for developers and node operators. It supports both the Ethereum mainnet and various testnets, and provides interfaces like JSON-RPC and command-line tools to interact with the Ethereum Virtual Machine (EVM). Geth is also modular, supporting different consensus mechanisms (such as Proof of Stake post-Merge), and is compatible with tools like MetaMask, Truffle, and others in the broader Ethereum ecosystem.

As a cornerstone of Ethereum's infrastructure, Geth is developed and maintained as open-source software under the stewardship of the Ethereum Foundation’s Protocol Support teams. Its stability, performance, and extensibility make it a key reference implementation for Ethereum clients, and it continues to evolve with major upgrades like The Merge, withdrawals, and upcoming protocol improvements.