Smoke testing is like checking the front of a bakery to make sure it's working before checking everything inside. When we make new computer programs, we use smoke testing to check if we can open the screen or the app without everything inside actually working. We do this to make sure that the program is properly installed and it won't crash when we start using it. It's like making sure you have the right keys to your house before going in. So, smoke testing helps us catch any big problems so we can fix them before we start doing important things with the program.