Load testing can take a few different meanings, however it generally refers to testing usage of data for a software program through simulating scenarios. This makes multi-user systems relevant load testing targets. A common software that would use load testing is one based on the client/server model such as web servers. Load tests that simulate actual use are almost always better than load tests that simulate hypothetical situations.

Another important aspect of load testing is it allows you to test your website's quality of service. This means that it will monitor statistics provided by the CPU, disk IO, memory, throughput of system, etc. A report will be generated off this. Overall, load testing softwares are a necessity that allows for important simulations to further improve multi-user systems and software.