|When Signup Style is Immediate, the signup is official as soon as PRESTO processes the Signup button click.
Conversely you use a Request style when you want an admin to Approve or Reject the request before
things are official. (Note that if you use requests, you can setup approval and rejection Auto Messages).
If an applicant for a job can be assigned to multiple locations,
you might want to select Request (generic). That is, generic requests are useful when you want to move people to a location as part of approving a signup (see Manage Activities' help for Locations and Generic Requests for more on this).
Otherwise select Request (plain).