Clover is a code coverage tool that helps developers write better test code faster. It shows which parts of an application's code have been tested and which haven't. Using Clover, teams can prioritize their testing efforts and selectively test only the code that has changed. Clover helps tests run smarter by only running the necessary tests and ordering tests to fail fast, reducing build times from an average of 40 minutes to just 7 minutes. This provides developers with faster and clearer feedback on failures.