Hot subdwarfs are a class of stars that are luminous and hot, but have lower masses and smaller radii compared to other stars of similar temperature. They are thought to be the evolutionary remnants of more massive stars that have lost a significant portion of their outer layers, leading to their compact nature. Hot subdwarfs are often found in binary star systems, where they interact with a companion star and transfer mass between each other. This can lead to the formation of exotic objects such as hot subdwarf binaries or hot subdwarf pulsators, which exhibit unique properties and behaviors. Studying hot subdwarfs can provide valuable insights into the evolution of stars, the dynamics of binary systems, and the physical processes that govern stellar lifecycles. Researchers often use advanced observational techniques and theoretical models to investigate the properties and characteristics of these intriguing objects.