Robot vacuums draw a digital floor plan before they clean

|Your robot vacuum builds a map of your home using lasers or cameras before it even starts cleaning — and that map shows up in your phone’s app. It lets the robot plan efficient routes instead of bouncing around randomly, and it remembers exactly where it’s been so it doesn’t waste time revisiting clean spots. The mapping feature is what separates a smart vacuum from a bumper car with a dustbin.