I think of it as "thinking about thinking", or better yet, "learning about learning". The following link to the blog sonicbirds puts it well.
Geared to adult learners, it makes some good points on the advantages of the adult learning methodology versus kid's. Basically adults can be intentional. Please have a click below.
You've got to learn your instrument. Then, you practice, practice, practice. And then, when you finally get up there on the bandstand, forget all that and just wail.
I'm a professional pianist and music educator in West Toronto Ontario. I'm also a devoted percussionist and drum teacher.