QTP, or QuickTest Professional, is a software testing tool developed by Micro Focus. It is primarily used for automated functional and regression testing of applications, allowing testers to create scripts that simulate user interactions with the software. This helps ensure that applications function correctly after updates or changes. QTP supports various technologies and platforms, making it versatile for different testing environments. It uses a keyword-driven approach, enabling testers to write scripts in a more understandable format. Additionally, QTP integrates with other tools in the Micro Focus suite, enhancing its capabilities for comprehensive testing solutions.