How can enterprises personalize content rapidly and understand the nuances of user’s behavior. How did we approach this within Microsoft for personalizing content in Bing, MSN, and Xbox? Personalizer enables enterprise use of reinforcement learning for personalization with two lines of code! It enables a full learning loop that runs at digital speed and learns from a simple reward score that optimizes towards your business’s goals. In this presentation we cover the why, what, and how behind the Azure personalization service with practical scenarios and use cases.