teacher in this case is the training data next we have unsupervised learning unsupervised means to act without anyone's supervision or without anybody's direction now here the data is not labeled there is no guide and the machine has to figure out the data set given and it has to find hidden patterns in order to make predictions about the output an example of unsupervised learning is an adult like you and me we don't need a guide to help us with our daily activities we can figure things out on our own without any supervision