Rollback, or reversion, is a process used in various fields, including software development and data management, to revert a system or application to a previous state. This is often necessary when a recent change causes issues, such as bugs or performance problems. By rolling back, users can restore functionality and stability without losing significant data. In database management, rollback is crucial for maintaining data integrity. If an error occurs during a transaction, the system can revert to the last stable state, ensuring that incomplete or incorrect data does not affect overall operations. This technique is essential for systems like SQL databases and version control systems.