High redshift refers to objects in the universe that are located at large distances from Earth, typically billions of light years away. These objects have redshifted spectra, meaning their light has been stretched to longer wavelengths due to the expansion of the universe. Studying high redshift objects can provide valuable insights into the early universe, including the formation and evolution of galaxies, the first stars and black holes, and the structure of the cosmic web. Researchers in this field use a variety of tools and techniques, such as telescopes, spectroscopy, and computer simulations, to study these distant objects and probe the history of the universe.