Code Coverage is a software testing metric that measures the percentage of code that is executed during testing. It helps developers understand which parts of their code are tested and which are not, allowing them to identify untested areas that may contain bugs. Higher code coverage generally indicates a more thoroughly tested application, but it does not guarantee the absence of defects. There are different types of code coverage, including line coverage, branch coverage, and function coverage. Each type provides insights into different aspects of the code's execution. By analyzing these metrics, developers can improve their testing strategies and enhance the overall quality of their software.