High redshift clusters refer to galaxy clusters that are observed at large distances, typically at redshifts greater than z=1. These clusters are important tools for studying the early universe, as they provide insights into the formation and evolution of galaxies and dark matter structures. High redshift clusters can be identified through various methods, including optical and infrared imaging, X-ray and radio observations, and spectroscopic surveys. These clusters are typically characterized by their high density of galaxies, hot intracluster gas, and strong gravitational lensing effects. Studying high redshift clusters can help researchers understand the processes of galaxy formation and evolution, the properties of dark matter, and the hierarchical growth of large-scale structure in the universe. It can also provide valuable information about the physics of galaxy clusters, such as their mass distribution, dynamics, and interactions with their surrounding environment. Overall, high redshift clusters represent a key area of research in observational astronomy and cosmology, offering important insights into the early universe and the formation of cosmic structures.