Work experience will always go down well. Don’t just think of paid work experience as it can be voluntary. The skills you’ve learnt will be really valuable. Go into detail when you talk about your work experience as you want to showcase to the university that you’re going to be the perfect applicant for the course.
A few courses will require you to have some work experience as part of your application, so the more you can talk about here the better. It will help you stand out. Life experience is also very valuable when answering this question. Is there anything you have done outside of work which can further re-emphasis your passion to study this subject? Do you have any hobbies, interest and personal achievements which are relevant?. Remember this is the first bit of information the admissions tutor will know about you, so the more you talk about your skills and attributes, the more you can wow them.