why I need to press extrude button before sending Gcode?

I'm trying understanding how to send Gcode to marlin,
I'm using Pronterface, when I start the program and I send G1 Z10 the stepper motor does not move just makes a sound
but if I press extrude button before sending G1 Z10 it moves just fine, what does the extrude button does that makes the G code work?

the extrude button also send a feed rate command
after that all move use this feedrate till the next feedrate command is sent

send G1 Z10 F180

feed rate is in mm/min. 180/60 = 3 mm/s

you haven't set you max feed rate for Z in your firmware correctly. This allows feed rates that are to high to be passed to the printer.
The max feed rate value cuts teh feed rate to what you machine can handle.

What it should be set to depends on your hardware

but play with different feed rates till it no longer moves correctly to determine the limit. Then set it in firmware.

most Z feed rates are 3mm/s for m8 threaded rods up to 8mm/s ish for real lead screws.

thank you so much!!, there is a lot that I need to learn