 The Gravity Recovery and Climate Experiment, GRACE, satellite mission provided a unique dataset for monitoring groundwater storage variations on a global scale. This dataset was used to estimate groundwater-related parameters such as the specific yield, which relates groundwater level to storage or to define the indices of groundwater depletion and stress. Additionally, GRACE-based TWS was applied to monitor aquifer depletion over large regions such as the Middle East, the Northwest India aquifer, the North China Plain aquifer, the Murray-Darling Basin in Australia, the High Plains, and the California Central Valley aquifers in the USA. However, issues related to the use of GRACE-based TWS have been identified, including the lack of validation of the methodology and the need for further research into its accuracy. This article was authored by Frederick Frappert and Guillaume Ramillion.