MOSFET driver input resistor
Consider your input, if you have a microcontroller driving that pin the resistor must be high enough so that MCU can drive current thru that resistor. It also must be low enough to be useful, so that gate is low when floating.

Personally i would put a 10k or similar value resistor there.

Basically here is longer answer to the guestion:

Calculating the pulldown resistance for a given MOSFET&#39;s gate