Snapping is a skate style that can be seen around the DMV (DC, Maryland, Virginia) area. The core of the style is the "snap" where the skater switches back to front and back in quick succession. They are technically one-foot-pivots but snapping doesn't usually have the torso completely make its rotation; the lower body pivots, leaving the torque to "help" snap back.
Snapping can be done to almost anything that has a rhythm. Here is a link to my collection. It should help you build an understanding of what kinds of sounds lead the movement.
Snapping looks like the music that leads it should be more energetic, but in practice, the most common music is more measured. Here are some examples:
Strawberry Letter 23 - The Brothers Johnson
A Funky Space Reincarnation (Rework) - Marvin Gaye->Mike Feva
Body To Body Boogie - Orlando Riva Sound
The snapping action you'll see can be done in pairs or attached to trains (skaters linked by interlocking hands). I'll argue that the snapping style started as a way to teach pivots at higher speeds. It looks and feels like the motion itself limits itself to 180 snaps. In order to chain more, the skater either reverses direction and snaps back or goes another 180 before pausing. The snap itself doesn't flow like how pivots can have a continuous appearance.
Good snappers don't need the support of their partner to chain pivots but the measured rotations still persist
Dips are the accent that gets a lot of attention from the style. Unlike dips seen in the slow set, these are more akin to a shoot the duck on the drop. The skater holds the partner's arm on the decent and relies on the counter balance for the recovery. It's pretty dynamic and stylish.
Slides are not very common
The place to be is in the DMV
Sportsman Hall especially during national parties