LOL
It had been asked under the title of work experience. I wonder
what it means
It means any other things related which you may want to put in.
Of course, these things should be those which are not mentioned in
the previous questions on your application form.
For example (And just for example, it needs not be a real
scenario), if you are applying to be a chef, you can write about
past awards which you have win in cooking competitions, if none of
the previous questions ask for your achievements.