A crypto node is a computer connected to a blockchain network. Nodes help keep the network running by sharing data, checking transactions, and storing blockchain history.
Types of nodes
A full node stores and verifies the blockchain rules. A light node relies on other nodes for some information. Validator or mining nodes may also help create new blocks, depending on the network.
Why nodes matter
Nodes help keep a blockchain decentralized. If many independent users run nodes, it becomes harder for one group to control what the network considers valid.
Running a node can require storage, bandwidth, updates, and technical care, but it gives users more direct verification than relying only on third-party services.