While Compensation Managers aren't often directly involved in the day to day operations of extending job offers to candidates, they can be when the staff are trying to navigate negotiations or when a new role is created. In asking this question, your interviewer wants to know you have the ability to effectively analyze and put a job offer together when needed. If you have an example of a time that you were consulted on your experience and knowledge surrounding a candidate job offer, talk about the situation and what you brought to the table to provide a solution. If you don't have the direct experience in a situation like this, you can certainly walk through what you feel would be the key discussion and research points when approached in this role.