High-redshift quasars are some of the most distant and luminous objects in the universe. Quasars are extremely bright, active galactic nuclei powered by supermassive black holes at the centers of galaxies. High-redshift quasars are those that are located at very large distances from Earth, meaning they are observed at an early stage of the universe's evolution. Studying high-redshift quasars can provide valuable insights into the early universe, galaxy formation, black hole growth, and the interplay between galaxies and their central supermassive black holes. Observations of high-redshift quasars can also help astronomers understand the processes that drive the evolution of galaxies and the formation of large-scale structures in the universe. The discovery and study of high-redshift quasars have revolutionized our understanding of the early universe and continue to be a fruitful area of research in modern astrophysics.