Value is information. Many people think in terms of how valuable certain types of information are. For instance knowing about a pending corporate acquisition or the secret knowledge around a mineral deposit or scientific discovery are all examples of specific types of information that would enable a person to profit from that knowledge.
But it is not the information that is valuable in these circumstances; rather it is the imbalance of information that creates the profitable circumstance for one person, possibly at the expense of someone else.
The monetary value for any item or service represents a consensus on a set of information about that item or service and the consideration exchanged in a transaction is the best estimate of a value.