A software testing framework serves the primary purpose of establishing a structured approach for testing software applications. It provides a set of guidelines and tools that streamline the testing process, ensuring consistency and efficiency across various testing phases. This framework includes test libraries, test scripts, and methodologies for executing tests. By implementing a framework, teams can automate repetitive tasks, which enhances regression testing and reduces the risk of errors. As a result, the quality of the software is improved, leading to better performance, reliability, and user satisfaction.