This is Field Notes, a new video podcast series by a16z that explores the business models and behaviors that are changing consumer technology. In this episode, host Connie Chan talks to Tracy Sun, the cofounder and SVP of Seller Experience at Poshmark. Their conversation covers the role of AI in fashion and styling, how live video is fundamentally changing the shopping experience, and Tracy's tips on building social marketplaces. 0:00 Intro 0:48 The story behind founding Poshmark 3:40 How seller behavior has changed 6:40 Gender differences in ecommerce behavior 7:37 How video is impacting ecommerce 10:15 AI's role in fashion 15:30 How resale behavior is changing 20:17 Social media meets marketplace commerce 22:13 Evolution of live-selling 27:25 Advice for marketplace founders 29:13 The "first sale" inflection point 31:57 Company culture