Explore a 12-minute conference talk from SIGIR 2024 focused on Direct Dual Propensity Optimization (DDPO) for post-click conversion rate estimation in the context of CTR, ads, and click models. Delve into the research presented by authors Hongzu Su, Lichao Meng, Lei Zhu, Ke Lu, and Jingjing Li as they discuss their innovative approach to improving conversion rate predictions in online advertising. Gain insights into how DDPO addresses challenges in estimating post-click conversion rates and its potential impact on enhancing ad performance and user experience.