validation data comes from validation generator validation generator reads 20 images at a time and we have 20 images of validation data so we can use just one step as the model training is running well see progress updates showing with our loss function and the accuracy it updates the connections in the dense layer that is the models impression of what makes an urban photo and what makes a rural photo and it makes those updates in six steps when it's done it got 79 percent of the training data right then it examines the validation data it gets