What it is
A Bitcoin node is a participant in the Bitcoin network that downloads, verifies, and stores the entire history of the Bitcoin blockchain. Nodes enforce the network's rules, relay transactions, and ensure the integrity of the ledger. There are different types, including full nodes that store the entire chain and lightweight nodes that only store a subset, relying on full nodes for verification.
The distributed network of Bitcoin nodes is critical for the network's decentralization and security. A higher number of active, well-distributed full nodes makes the network more resilient to attacks and censorship. News regarding network health or decentralization often refers to the number and geographic distribution of Bitcoin nodes. Running a node contributes to the network's robustness.
Why it matters
Bitcoin nodes are the backbone of the network, ensuring its security and decentralization. They validate all transactions and blocks, upholding Bitcoin's rules.
Reviewed under editorial standardsUpdated September 26, 2026Not investment advice