Gravimetry is a branch of geophysics that involves the measurement of the Earth’s gravity field. This field is influenced by variations in the density and composition of the Earth's subsurface, as well as by topographic and tidal effects. Gravimetry is used to map variations in the Earth's gravitational field, which can provide valuable information about the structure and composition of the Earth's interior. This technique is commonly used in mineral exploration, geothermal energy exploration, and the study of tectonic processes. Measurements are typically made using sensitive gravimeters that can detect even small variations in the Earth's gravitational field.