What is drag follow, and how and when is it used?
A drag shot is where you hit the CB below center, and the bottom spin wears off and slows the CB down as it approaches the OB. With a drag-follow shot, all of the bottom spin wears off and the CB develops topspin roll before getting to the OB, resulting in CB follow. A drag shot can help reduce the effects of table roll-off (CB drift due to a non-level or dirty table), since the CB will be moving faster during the early part of the shot and be less susceptible to roll off.
Cloth drag also has a large impact on draw shots. It can also be used to increase the effect of sidespin. For more information, see: