We first introduce the important concepts of RL and Contextual Bandits, followed by their applications in industry, including a technical case-study blog where we applied it to boost user engagement for Digitec Galaxus's newsletter. In the second half, you will do a hands-on lab applying these concepts to make a small recommender system using bandits and RL on Google Cloud, and optionally test your knowledge with a quiz on the course's page on Coursera.