Nodes are graphical representation of methods, functions, variables etc. Nodes can be linked to each other through Ports,
each node will have at least one Port. Each node has its own characteristics and performs a specific action.
Most Nodes are predefined, however you can create your own node using Method node, where you will be able to write your node functionality in C#.
To create a node right click on the graph, a list of categories of nodes will open, browse and select the desired node.