what is node ?

Initially, it's important to note that any individual has the potential to serve as a node. Nodes within the blockchain system are established to uphold the security and effectiveness of the blockchain network. Nodes are pivotal in both storing and processing blockchain data. Their responsibilities include verifying transactions and adding new blocks to the chain. Without nodes, the blockchain network would be unattainable. This is because blockchain data would need to be stored centrally, typically controlled by a single entity. Consequently, any changes to the data by that entity could go unnoticed by others, compromising the integrity of the network. This vulnerability exposes the blockchain to potential attacks. Nodes collaborate to establish a unified blockchain chain, thereby ensuring its integrity and security.

Aside from the benefits outlined earlier, nodes also earn rewards for verifying transactions, contributing to the security and scalability of the blockchain. These rewards, akin to real-world transaction fees incurred when transferring money, are received in the form of digital currency within the blockchain network. For instance, Toncoin nodes receive their rewards in Toncoins.

Congratulations, you've now learned about one method of investing and earning rewards within the blockchain and TON network. Setting up a node does require some IT expertise, which engineers can provide assistance with.