why is the engine speed macro 04 test

hi all total noob here. so i am sorry for probably dumb questions.
when using paneldue or Dcontrol there are some standard macros ,one of them is
04_test_motors macro
when pressing this
making my xyz goes to the home positions , drive against the stops and making a loud buzz sound and it looks like the steppers are blocked but want to go up or down.
why is this macro for?code_text; Motor Test Routine for Duet WiFi and Ethernet June 2018 ;Start logging M929 P"test4log.txt" S1 ; Test motors ;setup motors for test M906 X2000 Y2000 Z2000 E2000:2000 I100 ;set all motors to 2A with no idle current reduction ;The printer dimensions are deliberately set very high to allow a lot of moves during testing M665 R10000 L20000 B10000 H10000 ; set delta radius, diagonal rod length, printable radius and homed height M350 X16 Y16 Z16 E16:16 I0 ; Set 16x microstepping with NO interpolation M92 X80 Y80 Z80 E80:80 ; Set axis steps/mm for 1.8deg motor even though test rig has 0.9s M906 X2000 Y2000 Z2000 E2000:2000 I100 ; Set all motors to 2A with no idle current reduction M201 X10000 Y10000 Z10000 E10000 ; Acceleration limits (mm/s^2) M203 X100000 Y100000 Z100000 E100000 ; Maximum speeds (mm/min) ; Test motors M117 PRESS ALL THREE ENDSTOPS TO END HOMING G91 ; use relative positioning G1 S1 X3200 Y3200 Z3200 F9000 ; move XYZ motors, stopping when endstops are triggered ;end homing lines M117 TEST Z G91 G92 X0 Y0 Z0 ;M201 Z1000 G1 S2 Z2000 F50000 G1 S2 Z2000 F50000 G1 S2 Z2000 F50000 G1 S2 Z2000 F50000 G1 S2 Z2000 F50000 G1 S2 Z2000 F50000 G1 S2 Z2000 F50000 G1 S2 Z2000 F50000 M117 TEST Y G91 G92 X0 Y0 Z0 ;M201 Y1000 G1 S2 Y2000 F50000 G1 S2 Y2000 F50000 G1 S2 Y2000 F50000 G1 S2 Y2000 F50000 G1 S2 Y2000 F50000 G1 S2 Y2000 F50000 G1 S2 Y2000 F50000 G1 S2 Y2000 F50000 M117 TEST X G91 G92 X0 Y0 Z0 ;M201 X1000 G1 S2 X2000 F50000 G1 S2 X2000 F50000 G1 S2 X2000 F50000 G1 S2 X2000 F50000 G1 S2 X2000 F50000 G1 S2 X2000 F50000 G1 S2 X2000 F50000 G1 S2 X2000 F50000 ; Test E0 mapped to X M117 TEST E0 M584 X3 G91 G92 X0 Y0 Z0 ;M201 X1000 G1 S2 X2000 F50000 G1 S2 X2000 F50000 G1 S2 X2000 F50000 G1 S2 X2000 F50000 G1 S2 X2000 F50000 G1 S2 X2000 F50000 G1 S2 X2000 F50000 G1 S2 X2000 F50000 M584 X0 Y1 Z2 E3:4 ; Test E1 mapped to Y M117 TEST E1 M584 Y4 G91 G92 X0 Y0 Z0 ;M201 Y1000 G1 S2 Y2000 F50000 G1 S2 Y2000 F50000 G1 S2 Y2000 F50000 G1 S2 Y2000 F50000 G1 S2 Y2000 F50000 G1 S2 Y2000 F50000 G1 S2 Y2000 F50000 G1 S2 Y2000 F50000 M584 X0 Y1 Z2 E3:4 M84 ; disable motors M117 END OF TEST  POWER OFF BEFORE OPENING LID!; send message to DWC

delete all those macros. they are for testing and not for use by end users

aha ok wil do that ,thank u !