"Location" in Leavetrack is a generic term used to describe where an employee is based, in the context of the public holidays they enjoy. When creating a public holiday, you have to choose a location to which that holiday applies. Any employee based in that location will benefit from that public holiday.
The location drop-down box is populated with the locations you have already added. To add a new location, type it in the New Location box and update the employee record.
You can assign a set of alternative public holidays to a user so if a certain location has a blend of employees with differing public holidays, this can be accommodated.