Software testing is the process of ensuring that software programs and applications are functioning correctly and meeting their intended purpose. It is an important part of the software development process, as it helps to detect any errors or faults before they become problems in the real world. Software testing is performed through a variety of means, including manual testing by human testers, automated testing by machines, and hybrid testing by both humans and machines. The purpose of software testing is to gain assurance that the program or system is working correctly and providing the intended results. Software testing can help to identify possible problems, defects, or inefficiencies in the software. It can also help to ensure that new features or functions work properly when released.