Gravitational mass refers to the property of an object that determines the strength of its gravitational attraction to other objects. It is one of the fundamental properties of matter and is responsible for the force of gravity between objects with mass. Research in this area focuses on understanding the nature of gravitational mass, its role in the laws of physics, and how it interacts with other fundamental forces of nature such as electromagnetism and the weak and strong nuclear forces. Additionally, gravitational mass is a key concept in theories of gravitation, such as general relativity, which describes how massive objects interact with each other and with the fabric of spacetime. By studying gravitational mass, researchers aim to deepen our understanding of the universe and its fundamental laws.