Overview
Block confirmation is the number of blocks added after a transaction block, indicating settlement security. More confirmations mean a transaction is harder to reverse. It is a measure of finality.
How It Works
Each new block on top of a transaction increases the work needed to revert it. Exchanges and services require a number of confirmations before considering a deposit final. Proof-of-stake chains offer economic finality with fewer confirmations.
Why It Matters
Confirmations protect against double spends and reorgs. They are essential for merchant and exchange settlement. The required count balances security and speed.
Related Concepts
Block confirmations relate to Finality and Probabilistic Finality. They depend on the Fork Choice Rule.