Excellent job going through that section on supervised learning algorithms. In this section of the course, we're going to extend that knowledge into the other branch of machine learning algorithms and we're going to talk about unsupervised learning.

In this lesson, we're going to walk through a popular unsupervised learning algorithm called k-Means clustering. So this is going to give us a really nice view of how we can use unsupervised learning when we're building our applications and I think you're going to be able to see there's a very clear distinction between an unsupervised learning algorithm and a supervised learning algorithm.