Which testing method is focused on the functionality of the most critical aspects of software?

The focus of smoke testing is on verifying the most critical functionalities of the software to ensure that the application is stable enough for further testing. This initial check is designed to catch major issues before more rigorous testing is conducted. Smoke tests are typically run after a new build to confirm that the essential features work correctly, enabling the team to determine if the software is ready for more detailed testing activities.

While other testing methods, like regression testing, integration testing, and performance testing, are vital in their own right, smoke testing specifically targets the software's vitals, making it an efficient way to assess the application's readiness for additional, in-depth testing. The simplicity and swift execution of smoke tests help teams identify critical failures early in the testing process, streamlining the overall development workflow.