This is a unique text string ie: 'NHEA' that UCAS uses to differentiate between your university's different campuses.

1. You set up your campuses in the 'Campuses' tab in the app 'Courses'.

2. Campus identifiers must be unique.

For more information on the HESA Campus identifier - https://www.hesa.ac.uk/collection/c19051/a/campid