Qualifier is a misnomer, that is what cops do.
Most matches will have at least one classifier stage for which the scores are sent in to USPSA. When you have accumulated enough - they now go by the best four out of the latest six shot - you will get a classification card, Grand Master, Master, A, B, C, or D based on your scores versus the best on record. Then you can get prizes at major matches based on your placement within your class (ability) and division (gun.)