A full node is a computer that validates and relays transactions on the Bitcoin network. These nodes allow the Bitcoin network to remain independent and secure. When connecting to the Bitcoin network, these nodes use the current version of the blockchain to verify transactions and remain in agreement with the rest of the network.
Full nodes also store a copy of the blockchain, which is composed of all past bitcoin transactions. This ensures that all nodes have an up-to-date version of the blockchain, making it difficult for any malicious actor to carry out a 51% attack or double spend attack on the Bitcoin network.
Full nodes also broadcast new transactions to the entire network. This helps ensure that all nodes are aware of incoming transactions, and reduces latency for transactions to be processed. This is important for ensuring the security and efficiency of Bitcoin’s network.
The more full nodes there are on the network, the more secure and resilient it is. Without full nodes, the Bitcoin network would be vulnerable to centralization, which could result in the undermining of its decentralized trust model. That’s why it’s important for more people to run full nodes, as it helps keep Bitcoin safe and secure.