synchronous replication is a data management technique where changes made to a primary database are immediately copied to a secondary database. This ensures that both databases are always in sync, meaning they contain the same data at all times. If the primary database fails, the secondary database can take over without any data loss. This method is commonly used in environments where data integrity and availability are critical, such as in financial institutions or healthcare systems. While synchronous replication provides high reliability, it may introduce latency, as the system waits for confirmation that the data has been successfully replicated before proceeding.