Data replication is a crucial process in modern computing that involves copying and maintaining data across multiple locations or systems. This technique enhances data availability, durability, and performance by ensuring that information is accessible from various sources. It is widely used in distributed systems, databases, and cloud environments to prevent data loss and minimize downtime during failures. By implementing different replication strategies, such as master-slave or multi-master setups, organizations can improve system resilience and provide faster access to data for users across different geographical locations. Overall, data replication plays a vital role in ensuring the reliability of data-driven applications.