What metric does code coverage provide insights into?

Code coverage primarily provides insights into the extent to which the codebase is covered by tests. It indicates the percentage of lines or branches of code that have been executed during testing. This metric helps assess the thoroughness of testing efforts and can uncover areas of the codebase that lack proper test coverage. While code coverage is valuable, it's important to note that it doesn't necessarily guarantee the absence of bugs, but it does offer a quantitative measure of test effectiveness.