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

Which field needed explanation?
What prevented completing the form?
What information should appear before signup?

Author notes / illustrative keys where applicable:
1. A field needing explanation identifies ambiguity about what the form requires and why. Collect the field label and context rather than submitted personal values.
2. A completion barrier identifies the field or process stage that prevented signup. Review the actual requirement and available explanation, without collecting submitted personal data or assuming every abandoned form reflects interface confusion.
3. Information needed before signup identifies a prerequisite or purpose missing from the entry page. Explain current requirements without promising unverified account benefits.