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

Which topic were you trying to find?
What category label was confusing?
What search aid would help?

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: members search by task but categories use internal program names.
2. A confusing category label exposes a mismatch between member terminology and discussion organization. Test a clearer label or description against the topic people were trying to locate.
3. Turn the requested improvement into a testable next step. One illustrative action is: add task-oriented category descriptions.