This pre-enrolment means that you have already given all of the information which has been verified and processed. This means you do not have to wait in a line to give the information and to get them processed. That means that your time is saved from wasting it in a line! Now that you have already enrolled your information all you need to do is go to a counter and get the visa stamped. This means no more standing in line for 3 to 4 hours with just one pre-enrolment done in advance!