The UTXO is really what you will get whenever someone pays you some Bitcoin. The output of these deal could be the money they paid for your requirements. And it is, obviously, unspent whilst it sits in your wallet. Thus transaction output that isunspent.
In order to think about the present state associated with Bitcoin system to be a big pool of UTXOs: most of the payments that have already been received by Bitcoin users which they never have yet invested:
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