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

Which step was unclear?
How did you know your choice was recorded?
What confirmation information was missing?

Author notes / illustrative keys where applicable:
1. Use this answer to locate the part of the experience that needs explanation. The example issue to investigate is: readers cannot tell whether one category or all mail was removed.
2. The signal of recorded choice reveals whether the preference action provides understandable confirmation. Clarify the actual result and any remaining message categories, without promising immediate suppression or legal compliance beyond verified behavior.
3. Turn the requested improvement into a testable next step. One illustrative action is: state the scope of the preference change.