Whats the difference between a Swim Jig and an ordinary jig,and how does the retrieve method differ. Where are these meant to be fished? Any other info would be greatly appreciated

Swim jigs generally have a line tie that is in-line with the hook, and a pointy flat head that glides through the water. The Booyah Swim jig's head even flares out a bit to help it glide.  Just cast them out and let them sink for just a second before slowly retrieving it while gently pumping your rod tip to keep it swimming and gliding.