What is SPF?
SPF meaning “Set, Pause, Finish.” A stroke mantra recommended by many BCA instructors. In the “set” position, the cue should be still, close to the desired contact point on the cue ball. At this point, you should confident and comfortable with the shot you are about to execute. You should “pause” during the transition between the final back swing and the final forward stroke. Finally, you should follow through and freeze after the stroke is complete (i.e., “finish” the stroke).
reference: billiards.colostate.edu: Glossary of Pool and Billiards Terms and PhrasesWhat is