Software testing is like checking to make sure that a cake you baked is yummy and safe to eat before serving it to guests. It involves examining the different parts of the software to find any bugs, errors, or flaws that could make it not work as expected. Just like you wouldn't want to serve a cake that's burnt or undercooked, you wouldn't want to release software that doesn't function properly. Testing helps ensure that the software meets quality standards and works correctly for users.