A light node is a type of node in a blockchain network that does not store the entire blockchain. Instead, it only keeps a portion of the data, typically the block headers, which contain essential information about the blocks.Light nodes rely on full nodes to validate transactions and blocks. They communicate with full nodes to access the data they need without saving the entire blockchain, making them faster and less resource-intensive. This is particularly useful for devices with limited storage and processing power, such as smartphones.By using a light node, users can still interact with the blockchain, sending and receiving transactions. However, they must trust full nodes for accurate information, which can create a dependency. Overall, light nodes strike a balance between convenience and security, allowing more people to participate in blockchain networks without requiring significant hardware resources.