How Does a Robot Vacuum Actually Know Where It Is?

A robot vacuum uses sensors and a map to know where it is. Imagine you're playing hide-and-seek in your house, you look around for clues like the size of the room, the corners, and maybe even the furniture. A robot vacuum does something similar: it takes notes on its surroundings as it moves, making a picture of your home in its brain. It uses this map to know where it is and where it needs to go next.