Geth

Geth, short for Go Ethereum, is one of the primary implementations and clients of Ethereum. Written in the Go programming language, it is the most widely used client with the largest user base, providing a variety of tools for users and developers. Geth is written in Go and is fully open source.

Geth is both a client and a library that provides API interfaces.

When operating as a client node, a Geth node can communicate with other Ethereum nodes over the network, synchronize blockchain data, and share transaction information. Geth allows users to run full nodes and archive nodes. Full nodes download and verify the entire blockchain, while archive nodes retain the complete block history data.

Developers can also use the JSON-RPC, WebSocket, and IPC (Inter-Process Communication) interfaces provided by Geth to programmatically interact with nodes, send transactions, query blockchain state, and more.

You can learn more about Geth in the Geth documentation.