The Piezometer Test is a geotechnical method used to measure groundwater or pore water pressure within soil and rock layers, providing critical data for evaluating the hydraulic conditions of a site. This information is essential for understanding soil behavior, especially in saturated or soft soils, which can impact the stability of foundations, embankments, and slopes. Piezometers offer real-time and long-term monitoring of groundwater levels, helping engineers predict issues like soil liquefaction, excessive settlement, or seepage. The test is widely applicable across different soil types and is valuable for identifying potential problems before they lead to structural failures. Although highly effective, its accuracy depends on proper installation and consistent monitoring, particularly in highly permeable soils.