This is a form of Alpha asking bid. This is only used on the 2-level, and after a Beta bid. Since its only used on the 2-level you use this if parnter has less then 4 controls.
Answer:
1. step: Worse then honor third.
2. step: Honor third.
3. step: At least 4 small cards.
4. step: Minimum honor fourth.
5. step: Minimum two top honor third.