Robotics - What Is Motion Planning and Perception?

I'm guessing when you're working on robots, there's such broad systems. So did you have one thing or the other that you specialize in or that you gravitated towards? I was definitely more on the software side and kind of the software and systems side of how do you think about the whole thing working together? You know, I'm definitely not a mechanical engineer. But on theSoftware side, I kind of worked at this intersection of motion planning and perception. And so say a little bit more, what is motion planning? Yeah.