Multi-server systems are setups that use multiple servers to handle requests and workloads. This design improves performance and reliability by distributing tasks among several servers, which can work simultaneously. If one server fails, others can continue to operate, minimizing downtime and ensuring better service availability. These systems are commonly used in environments like data centers and cloud computing, where high traffic and data processing demands are prevalent. By balancing the load across multiple servers, organizations can enhance their capacity to manage large volumes of users and data efficiently, leading to improved overall system performance.