their own to discover and present the interesting structures in the data let's look at a couple examples let's see you want to group customers by their purchasing behavior people buy item 810 to buy item B then obviously you should recommend these items to people interested in one of them another example could be in Netflix Netflix video recommendation system it recommends TV series movies and whatnot and they do this by using a series of unsupervised learning algorithms a great algorithm here is called k-means not for