Galaxy surveys are research projects that aim to systematically study and map the distribution of galaxies in the universe. These surveys typically involve large telescopes and advanced imaging technology to detect and catalog thousands or even millions of galaxies. By analyzing the positions, distances, and properties of these galaxies, researchers can explore the large-scale structure of the universe, study the evolution of galaxies over time, and investigate the fundamental properties of dark matter and dark energy. Galaxy surveys play a crucial role in advancing our understanding of the universe and its origins.