The Value Node is a simple node to input numerical values to other nodes in the tree.
This node has no input sockets.
Single numerical value (floating-point).
Value
The value set in the node properties.
In the following example the Value Node is used to control multiple values at once, this makes the node a useful organizational tool.
Example of the Value node.
Tip
From this you can also make different values proportional to each other by adding a Math Node in between the different links.