Test metrics are quantitative measures used to evaluate the effectiveness and efficiency of software testing processes. They help teams assess the quality of the software by tracking various aspects, such as the number of test cases executed, the number of defects found, and the time taken for testing. By analyzing these metrics, teams can identify areas for improvement and make informed decisions about their testing strategies. Common test metrics include test case pass rate, defect density, and test execution time. These metrics provide insights into the overall health of the software and help ensure that it meets the required standards before release. By regularly monitoring these metrics, teams can enhance their testing processes and deliver higher-quality products.