Every painting, whether it's a rough sketch or semi-realistic art, regardless of subject matter, has a composition. Line, shape, color, form are organized according to the principles of composition, to give the painting structure and convey the intent of the artist.
With fundamental things (what is balance and how to apply it in simple scene's sketches, how the contrast works to convey the important things in illustration, etc.) gradually growing more complex, your listener gets a solid idea of the value of composition skills and their integral use in any task of a digital artist.
It's intended to be a middle-level digital illustration course for those who want to develop or improve composition skills with a lot of practice tasks like working with the frame, color, light, forms, etc.