ELI5: Explain Like I'm 5

Pulsed rocket motor

A pulsed rocket motor is like a normal rocket motor (the thing that makes a rocket fly) but it works in short bursts instead of one long blast. Basically, it will fire short blasts of fuel at different times and these blasts will help keep the rocket going in the right direction. This means that the rocket can be much more precise when flying and is especially useful for spaceships and things like that.