What is Bitcoin transaction confirmation?

When sending "digital money" in the Bitcoin network, an application is created, where the direction and amount of the transfer are confirmed. Blockchain technology works on the basis of constant generation of blocks with data about Bitcoin itself and transactions ordered by network users. Each new block includes user requests for digital funds transfer. If we talk about the Bitcoin system, then the inclusion in the next six blocks is considered a complete confirmation of the transaction. Simply put, the transaction must be confirmed by six information blocks, only then the digital currency is transferred to the specified wallet.
The problem sometimes lies in the fact that the confirmation of the transaction by the system itself can take some time - from 5 minutes to two days.