As social media algorithms increasingly mediate social experiences, there has been a rapid increase in research on the effects of how these algorithms are configured, alternatives to engagement-centric models of content ranking, and algorithmic approaches to content moderation such as Community Notes. This workshop brings together leading experts in the area to foster collaborations and shape the trajectory of the field. The workshop is hosted by the Institute for Foundations of Data Science (FDS) at Yale University, in Kline Tower, on October 16-17, 2025. The schedule will feature talks by invited speakers as well as a poster session.