you've used a pre-trained model to make predictions that gives you great results if you want to classify images into the categories used by the original models but what if you have a new use case and you don't categorize images in exactly the same way as the categories for the pre trained model for example I might want a model that can tell if a photo was taken in an urban area or a rural area my pre trained model doesn't classify images into those two specific categories we can build a new model from scratch for this specific purpose but to