System Testing is a type of software testing that evaluates the complete and integrated software application to ensure it meets specified requirements. This testing phase occurs after unit testing and integration testing, focusing on the overall functionality, performance, and reliability of the system. Testers simulate real-world scenarios to identify any defects or issues before the software is released to users. The primary goal of System Testing is to validate the end-to-end system specifications and confirm that the software behaves as expected in various conditions. It encompasses different testing types, including functional, non-functional, and regression testing, ensuring that all components work together seamlessly.