What is confirmation?

What does it mean to "confirm" a transaction?

Usually, upon the receipt of cryptocurrencies (coins), the new owner cannot dispose of them immediately. Once a transaction is made, it is sent to the network (Blockchain) for execution and must be included in a block in order to become legitimate. The process of including a transaction in the found block is called a transaction confirmation. Inclusion in 1 block = 1 confirmation, when there are more than one such confirmation (for BTC), the transaction is considered confirmed. This feature was introduced to protect against repeated spending of the same coins. The classic Bitcoin client will display the transaction as "unconfirmed" until there are 6 confirmations (6 blocks found). We consider payment accepted upon the receipt of the 2nd confirmation transaction. On our service, 24 hours (1 day) are allotted for receiving BTC. If the transaction receives the 2nd confirmation within 24 hours, the exchange will be completed automatically by the systеm. If it takes longer to confirm the transaction (sometimes it can take several days), write to our support when the confirmation is received, and we will complete the exchange manually.