A. Backing tracks can be extremely helpful for all musicians - they are great aids for learning how to solo, or for improving your soloing, and they can help you master your instruments. They can also save you a loads of effort and time (relative to getting together with friends/arranging where to jam/getting there/getting set up etc) They are a lot of fun - improvising is such a great stress reliever and really helps you improve your self. Also practice sessions are a lot more interesting when you’ve got something to play to!