Redshift evolution is a term used in astronomy to describe the changes in the redshift of astronomical objects over time. Redshift is a measurement of how much the light from a galaxy or other object has been stretched as it travels through the expanding universe. As the universe expands, light from distant objects is stretched to longer wavelengths, causing their redshift to increase. By studying the redshift evolution of objects, astronomers can gain insight into the history and evolution of the universe. For example, observations of the redshift evolution of galaxies can help to understand how galaxies form and evolve over time. Additionally, studying the redshift evolution of cosmic background radiation can provide information about the early universe and the big bang. Overall, redshift evolution is a key concept in astronomy that can help researchers better understand the dynamics and history of the universe.