Nodes play an essential role in the field of blockchain technology for ensuring that separate networks function properly and do not fail. To fully comprehend how blockchain systems work, you must first understand what nodes are and how they function.
Nodes are just the machines that connect to the network. They keep copies of the blockchain and communicate information with other computers. Users are not required to perform these tasks by hand. Typically, all customers need to do is download and execute the blockchain program. The rest will be taken care of right away.
In its most basic form, this is what a node is, although it can also include additional users who connect to the network in any way. In the Bitcoin realm, for example, a simple wallet app on your phone is known as a “light node.”