What you can find in each subcategory:
In Job Vacancies, you can post or look for full-time job offers only
In Part Time Jobs, you can post or look for part-time & freelance job offers.
In Internships, you can find offers for people who need professional trainings or internships for their study.
In Job Seekers - CVs, you'll find adverts from people seeking employment and assistance in job seeking.