The keyboad or the piano has a wide harmonic range, one of its advantages over the myriad of instruments out there. Learn to exploit this feature and play some very interesting and beautiful chords to enhance your song playing.
Learn to add extensions such as 7th, 9th etc the right way in order to create very mellifluos sounds that enhance your music and your time with your instrument.
If you already know how to voice chords properly on the piano for accompaniment this is the course for you. Knowledge of harmony will accelerate your learning through out this course.