A relativistic jet is a narrow, high-speed outflow of plasma emitted from the vicinity of compact astronomical objects such as black holes and neutron stars. These jets are produced by the intense gravitational and magnetic forces in the vicinity of these objects and can extend over vast distances into space. Relativistic jets emit radiation across the electromagnetic spectrum and play a significant role in shaping the environments around them, influencing the growth of galaxies, and contributing to the dynamics of the universe on cosmic scales.