Anything you do outside of work that may vaguely apply to your job. For example, if you are applying to be a vet tech, you can put down that you ride horses regularly. If you're applying as a social worker, you can say you volunteer on weekends. Stuff like that.
If you belong to a club or play sports, or have hobbies. People who belong to groups tend to know how to work well with others. And people have hobbies have a way to relieve stress. They tend to make well rounded employees.