What ar your Three of your greatest achievements so far in work experience or college or in life?
Three of your greatest achievements could come from college, work, or life experiences.
College: If you've won any awards or distinctions then this is the time to mention them. Maybe you partook in some out of school activities and these can be mentioned here. Don't put something down just for the sake of putting something down as this can be worse than not answering.
Work: Have you been promoted? Have you completed any projects? Rewritten or updated any procedure manuals? Have sales gone up or negative stats gone down since you were in a position? This is a time to exaggerate (within reason) in your own favor remember.
Life: Have you helped in an organization? Have you received an award? Did you do something outstanding or unusual? These can be used, especially if they are related to the position you seek.