Bitcoin Explorer Org https://hedgedoc.k8s.eonerc.rwth-aachen.de/kFtMQ9aTSTis_8Gbdx6V0Q/ A blockchain unconfirmed transaction refers into a transaction initiated by a user that is definitely however to be confirmed and recorded to the blockchain by a validator or miner. It really is also known as a zero-confirmation transaction. These transactions stay in the mempool (memory pool) https://www.instapaper.com/p/16801185