Stellar activity refers to the various phenomena that occur on the surface of stars, including sunspots, flares, and coronal mass ejections. These activities are driven by the magnetic fields that are generated within the stars themselves. By studying stellar activity, scientists can gain insights into the internal structure and dynamics of stars, as well as the mechanisms that govern their evolution and behavior. The study of stellar activity is important for understanding the overall behavior of stars in our galaxy and beyond, as well as for predicting potential threats to our own planet, such as solar storms and their impact on Earth's magnetic field.