What is a node?
A Bitcoin node is any computer that runs the Bitcoin software and connects to the network. It helps store, verify, and distribute the blockchain — the public ledger of all Bitcoin transactions.
Full node vs. lightweight node
Most secure are full nodes: they download the entire blockchain and independently verify every transaction. Lightweight (SPV) nodes trust other nodes for some information and are more common on mobile devices.
Why nodes are essential
Nodes enforce the rules of the network. They reject invalid blocks and transactions, help keep the system decentralized, and allow users to interact with Bitcoin without relying on a third party.
Can I run my own node?
Yes. Anyone can run a Bitcoin node with standard hardware and internet access. Running a node gives you privacy, independence, and a better understanding of how Bitcoin works.
