You can “give” it to many people and still keep it. This is one difference (one of the many) between gossip and money, once you give an amount of money to somebody, you don’t have it any more and you can’t give the same money to someone else.
How is this related to network mapping? I have explained the basic concepts of centrality below. These will give you a good measure for the day-to-day, implementation-oriented use of Net-Map.
However, if you are interested in getting more food for thought, and want to understand why centrality in a flu infection network should be measured differently from centrality in a money network, I’d like to recommend one of my favorite conceptual papers on social network analysis, Steve Borgatti’s “Centrality and Network Flows.”