Stellar magnetic fields refer to the magnetic fields surrounding stars, which play a crucial role in various astrophysical processes. These magnetic fields are generated by the movement of charged particles within the star, and can have significant effects on a star's structure, atmosphere, and evolution. Research in this area aims to understand the generation, evolution, and characteristics of stellar magnetic fields, as well as their impact on stellar activity, such as flares, coronal mass ejections, and stellar winds. Scientists study stellar magnetic fields using a variety of observational and theoretical techniques, including direct measurements of magnetic fields on the surfaces of stars, as well as indirect measurements based on the effects of magnetic fields on stellar spectra and polarized light. Overall, research on stellar magnetic fields is essential for understanding the fundamental properties of stars and their interactions with their surrounding environments, and can provide valuable insights into the dynamics and evolution of stars over their lifetimes.