A snapshot block is a specific point in a blockchain where the state of all accounts and their balances is recorded. This snapshot captures data at a given time, allowing users and developers to reference the network’s status at that moment.Snapshot blocks are often used in various scenarios such as airdrops, forks, or network upgrades. For instance, when a new token is distributed to holders of an existing token, a snapshot is taken to determine who is eligible to receive the new tokens based on their holdings at that moment.By taking a snapshot, developers can create a clear historical reference that helps ensure fairness and transparency. It also aids in restoring balances in case of issues that may arise during upgrades or changes to the system. Ultimately, snapshot blocks serve as a critical tool for managing changes within a blockchain, ensuring that all actions taken are based on a verified state of accounts at a specific time.