What it is
In a blockchain network, a node is any computer or server that connects to the network, communicates with other nodes, and performs various functions to maintain the blockchain. Nodes store a full or partial copy of the blockchain's transaction history, validate new transactions and blocks according to the network's rules, and relay this information to other nodes. This distributed network of nodes is essential for the blockchain's decentralization, security, and integrity, eliminating the need for a central authority.
The number and distribution of nodes are key indicators of a blockchain's decentralization and resilience. A higher number of active, geographically dispersed nodes makes a network more robust against attacks and censorship. News often reports on node count statistics or issues affecting node operators, such as software updates or hardware requirements. For retail investors, understanding nodes helps assess a blockchain's security, decentralization, and the overall health of the network supporting their assets.
Why it matters
Nodes are the backbone of blockchain decentralization and security. Understanding their role helps you gauge the robustness and integrity of a crypto network.
Reviewed under editorial standardsUpdated September 26, 2026Not investment advice