Load balancers are designed to spread workloads across multiple computing resources, such as servers, to ensure that no single resource becomes a bottleneck. This helps to improve the performance of applications by reducing the load on individual servers and also increases the availability of the application by ensuring that if one server fails, the others can continue to handle the traffic. Incorrect answers may imply incorrect functionality of a load balancer, such as not distributing traffic or not affecting performance, but these do not properly reflect the role of a load balancer in network implementations.