You'll learn how to play on a 4 or 5-stringed bass guitar by using music that you yourself will bring to the lessons. The different sections in the tracks will be transcribed to a level appropriate tabulatur, or in musical notation using the bass clef.
In addition to the practice material, you'll also learn the theoretical side of the music. It is important to know what musical scales and harmony are.
You also have to develop a feeling for rhythm, allowing you to 'groove.' Timing is everything after all. When you develop a good tone formation, your 'sound,' you'll get an awesome groove.
You will learn to read chord symbols, allowing you to improvise bass lines. Your ears will be trained, plus your knowledge about musical scales and harmony will be applied.