The article delves into the pivotal role of blockchain nodes, detailing their function, types, and significance in decentralization and security. It addresses common questions like node operation, potential vulnerabilities, and the accessibility of running a node, offering clarity for both novices and tech enthusiasts. Structured logically, it begins with fundamental definitions, followed by node operations, types, importance, security concerns, and concludes with practical insights on node management. Keywords enhancing scanning include: blockchain, nodes, decentralization, security, consensus, PoW, PoS, and node operation.