Water supply and sanitation (WSS) utility aggregation is a fairly recent trend–in fact, 75% of all aggregations have happened over the past 15 years. Based on the World Bank's Global Solutions Group report, Joining Forces for Better Services? When, Why, and How Water and Sanitation Utilities Can Benefit from Working Together. The video introduces the report and toolkit resources that provide recommendations for successful aggregation. The recommendations, as also presented in the complementary toolkit, are based on evidence and observed experiences rather than on theoretical considerations; and sometimes the advice runs counter to conventional wisdom with regard to aggregation practices.