The ACM WSDM 2025 Conference Report

The 18th edition of the ACM International Conference on Web Search and Data Mining (WSDM) was successfully held from March 10 to 14, 2025, at the Hannover Congress Centre (HCC), Hannover, Germany. WSDM 2025 was held as an in-person conference. The first day of the five-day event featured tutorials, industry day, and doctoral consortium. The next three days were the main conference days, which consisted of keynote speeches, plenary and poster sessions, and demo sessions. The last day of the event was dedicated to WSDM Cup, WSDM Day, diversity and inclusion sessions, and workshops. This brief report provides an overview of the organization, program details, and statistics from the Program Chairs and General Chairs. Further details are available at https://www.wsdm-conference.org/2025/. At the conclusion of this report, we express our deepest gratitude to the authors, volunteers, steering committee, sponsors, and supporters.