As you continue studying music, you will learn that music is comprised of three main elements—rhythm, harmony and melody. The bass lays the foundation for two of these three elements. Studying bass means to study rhythm and to study harmony, and the techniques to create them on the bass.
Bass is a very powerful instrument. A good bassist can often rescue a mediocre group, while a bad bassist can easily destroy a great group. Use your bass-playing powers for good, not evil. Learn about rhythm. Learn about harmony.