For me it's just a way to make communicating about music quicker. My ear is mediocre at best. Given time I can figure out what's being played, but having anothe

For me it's just a way to make communicating about music quicker. My ear is mediocre at best. Given time I can figure out what's being played, but having another person say, "It's a I-vi-ii-V-I in F" communicates it much more quickly.