I believe music, when it's right, can inspire, energize, comfort, heal, entertain and generally help you feel good! 
What is "Jam" music?
The term "Jam" music can mean different things to different people. I believe "Jam" music has at least these three important characteristics.
* Jam music is "eclectic". It combines the musical influence of different styles of music. (Such as Jazz, Rock, Blues, World Beat, Country, Reggae, Classical, etc.)
* Jam music involves improvisation. That is, the musicians, while playing, "make up stuff" they haven't played before, based on the influences of "the moment" in an attempt to create something "magical". (There can be varying degrees of the amount of improv, but improv is a key component.)
* The players and listeners of jam music have a belief  that when it's right, the music can help make the world a better place.