Blazars are a type of active galactic nuclei (AGN) that are characterized by their highly variable and polarized emission of electromagnetic radiation, particularly in the form of gamma-rays and radio waves. Blazars are believed to contain supermassive black holes at their centers, which are actively accreting matter and producing intense jets of particles that are directed towards Earth. These jets emit radiation across the entire electromagnetic spectrum, and their variability and high luminosity make blazars particularly interesting objects for study in the field of astrophysics. Researchers study blazars to better understand the physical processes occurring in and around supermassive black holes, as well as to probe the nature of relativistic jets and the mechanisms responsible for their emission.