Hydrostatic pressure is the pressure exerted by a fluid at equilibrium due to the force of gravity. It increases with depth, meaning that the deeper you go into a fluid, the greater the pressure. This principle is crucial in various fields, including engineering and meteorology, as it helps in understanding how fluids behave under different conditions. In practical terms, hydrostatic pressure can be observed in everyday situations, such as when you dive into a swimming pool. The pressure on your body increases as you descend, which is a direct result of the weight of the water above you. This concept is essential for designing structures like dams and submarines, ensuring they can withstand the forces exerted by the surrounding fluid.