Stop in for a cup of coffee

So dumb question. What is buffing in this procsess? Is that simply a cloth (or cloth wheel) to clean up residue from the clay?
The clay bar removes things deeply embedded in the paint. Things like fine metal dust, etc. it also removes oxidized paint on the surface.

Buffing then levels the surface making it smooth and even. Power buffing is required to really make it smooth.

Polishing then fine tunes the surface to a mirror finish.

The wax only protects and does not impart any additional shine