I have 'searched' & can't find the exact procedures listed for the UDU process, other than the general description! I am totally new to the UA system, so would appreciate some explanation about what to expect!

Right now, a couple of my reservations (booked on CO) w/UA legs show 'upgrade: pending' -- so I am assuming that if the UDU comes through -- it will say 'confirmed' with a new seat assignment -- is this correct?!