The Gravity Well Station represented a kind of installation in space, brought into existence by the Galactic Empire. Its purpose was to prevent opposing forces from escaping combat through the use of hyperspace.
The Galactic Empire conceived of and built the Gravity Well Station prior to the outbreak of the Galactic Civil War. Its function was to hinder enemy vessels from initiating a jump to hyperspace.
Additionally, the Empire employed comparable generator technology, akin to that found in the Gravity Well Station, within vessels such as the Immobilizer 418 cruiser and the Interdictor-class Star Destroyer.