Geth

Geth, short for Go Ethereum, is a major implementation and client of Ethereum. It is written in the Go programming language, is the most widely used client with the largest user base, and provides various tools for users and developers. Geth is written in Go and is fully open source.

Geth serves as both a client and a library that provides API interfaces.

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 the node, send transactions, query blockchain state, and more.

You can learn more about Geth in the Geth documentation.