And how it should taste at this stage of the process. It needs experience to try some dough and extrapolate from it how the cake/bread/... will taste after baking it. Same with many sauces, for example. Things change when mixed with pasta, potatoes, veggies, meat. A sauce is much stronger without them. If you taste it and are inexperienced you may think "just right" and the dish will end up terribly bland.