What is the confirmation threshold for a blockchain?

The confirmation threshold refers to the number of additional blocks that are added to the blockchain after a specific transaction has been included in a block.
Once a transaction is first included in a block and that block is successfully mined or validated, it receives its first confirmation. Each subsequent block added on top of that one increases the confirmation count by one. The threshold represents the predetermined number of confirmations required for a transaction to be considered fully validated and final.
This number varies across blockchain networks and transaction types and is a security measure that ensures transactions are securely and permanently recorded, reducing the risk of double-spending or chain reorganizations.