The experiences that you do can be any kind of employment or voluntary experience.
You must complete at least three days or 21 hours for each experience, this can be three whole days or any part thereof.
The experience must take place during your time at university.
The reason for this is that employers look to see what else you have achieved other than your degree.
There is more information at https://myuni.swansea.ac.uk/sea/sea-award/explore/.