Stellar parameters are the characteristics used to describe the physical properties of stars, such as their mass, temperature, luminosity, radius, and age. These parameters are crucial for understanding the evolution and behavior of stars, as well as for identifying and classifying different types of stars. Researchers use various methods, including spectroscopy and photometry, to measure and determine these parameters. By studying stellar parameters, scientists can gain insights into the processes that drive stellar evolution, the formation of galaxies, and the overall structure of the universe.