The 100 W power dissipation rating at the case tells you the heatsinking requirement: a solid copper area on the drain tab is expected for sustained high-current operation.
Gate drive and switching considerations
For a 20 kHz motor-drive PWM, a gate-driver IC capable of sourcing and sinking a couple of amps is advisable to keep switching losses in check. The 7720 pF input capacitance at 15 V drain-source confirms the gate capacitance is substantial, so a weak logic-level output will not drive this FET directly at speed.
