Groundwater is a crucial source of freshwater on Earth, making up 97% of the liquid freshwater available. Scientists are working to better understand and manage groundwater resources to ensure they are sustainable and of good quality. They are focusing on issues like the impact of new pollutants, ways to recharge aquifers, and the potential of groundwater in urban areas and continental shelves. By effectively communicating scientific knowledge, policymakers and managers can make informed decisions to protect and maintain groundwater for the services it provides.