M dwarf stars are a type of main sequence star that are smaller, cooler, and less massive than the Sun. They make up about 70% of the stars in our galaxy and are the most common type of star. M dwarfs are known for their long lifetimes, with some expected to live for hundreds of billions of years. Research on M dwarf stars is important for several reasons. They are prime targets in the search for exoplanets, as their small size makes it easier to detect the presence of Earth-sized planets in their habitable zones. M dwarfs are also of interest in the study of stellar evolution, as their unique characteristics allow researchers to investigate the processes that govern star formation and evolution. Overall, research on M dwarf stars provides valuable insights into the nature of stars and planetary systems, as well as the potential for finding Earth-like exoplanets in our galaxy.