Cryptocurrency transactions, including bitcoin transactions, are required to be authenticated in the blockchain. This verification is called confirmation. Confirm means that the transaction has been processed on a block-chain network. Whenever a transaction is included in a block or a block is stacked on top of a block, a conform is made.
(Eg: 3 confirms adds two blocks after the first block's confirmation).
The transaction history of the blockchain is recorded and managed by all participants. First, when a transaction is broadcast to a blockchain network, the validator obtains a transaction fee by performing an operation (called mining) to verify the transaction. In addition, one block is created and linked to the existing block. At that time, the first transaction has occurred in the transaction.