In Episode 39 of '100 Days of Data,' Jonas and Amy dive into the powerful role of AI in retail and marketing, revealing how your shopping cart might know you better than you do. They explore how recommendation systems work using collaborative and content-based filtering, and how businesses are creating hybrid solutions to drive sales. The episode also unpacks the nuances of personalization—beyond just product suggestions—and the strategic use of AI in customer segmentation and loyalty programs. Practical stories from real businesses illustrate how personalized emails and smart coupons can significantly boost engagement and revenue. Privacy isn’t left out; the hosts discuss how techniques like federated learning are keeping customer data secure while still enabling tailored experiences. Whether you're in tech or retail, this episode shows how AI is reshaping how businesses connect with customers.