Numerical relativity is a branch of theoretical physics and astrophysics that focuses on solving the equations of general relativity using numerical methods. This field involves simulating the behavior of spacetime, gravitational waves, and black holes using computer simulations. Numerical relativity plays a crucial role in studying astrophysical phenomena such as the merger of black holes and neutron stars, as well as the dynamics of compact objects in the universe. This research area has made significant contributions to our understanding of the fundamental workings of gravity and the evolution of the universe.