Hand writing a pretty basic live tooling program, this is my first time diving into face working and theres a code in the HAAS workbook sample program that has me curious/scratching my head. any insight is really appreciated here. It calls up a "G4 P3" and specifies its for 'servo stabilization'? is this for the servos powering the turret end of things? or for the spindle? what is the P value specify? any particular applications where this is handy/unnecessary? As far as I can tell, the workbook is very vague as to what this code is. Sample program as follows, put the area in question in bold

Bolt Hole Circle 3 holes @ 120° on 3. Inch BHC
G0 X3.0 Z0.1
G98 (in/min feed)
M19 P0 (rotate spindle to 0 degrees)
M14 (clamp spindle)
M133 P2000 (turn on live tooling 2000 rpm)
G1 Z-0.5 F40.0
G0 Z0.1
M19 P120 (rotate spindle to 120 degrees)
G4 P3 (Dwell for servo stabilization)
M14 (clamp spindle)
G1 Z-0.5
G0 Z0.1
M19 P240 (rotate spindle to 240 degrees)
M14 (clamp spindle)
G1 Z-0.5
G0 Z0.1
M15 (unclamp spindle)
M135 (live tooling stop)
G53 X0
G53 Z0
M30