If nothing was unclear or difficult, say so. Skip questions about steps you did not experience; use not applicable where appropriate.

Which function was explained clearly?
What practical question remained?
What example would help?

Author notes / illustrative keys where applicable:
1. The clearly explained function identifies which part of the demonstration connected a feature with understandable behavior. Do not treat clarity as proof of performance.
2. An unanswered practical question identifies the boundary between what the demonstration showed and the shopper's intended use. Provide verified scope or a suitable official reference, without inferring effectiveness from the demonstration alone.
3. A useful example identifies the practical use context still missing from the demonstration. Show verified behavior and relevant limits rather than inferring suitability for every shopper.