Testing where in we subject the target of the test , to varying workloads to measure and evaluate the performance behaviors and ability of the target and of the test to continue to function properly under these different workloads.

Load testing involves subjecting a system to varying workloads to measure performance characteristics like response time, throughput, and resource utilization. It helps identify performance bottlenecks and ensures the system functions properly under different load conditions. Integration testing focuses on interfaces between components, system testing validates the complete system, and usability testing evaluates user experience - none specifically test workload performance behavior.