Off-line programming (in robotics) is a way to get robots to do certain tasks without having to write code for each one individually. Instead, you can give the robot a set of instructions for each task and let it figure out the best way to do it. It's like giving your friend a list of chores to do and then letting them figure out the best way to do them. This saves time and effort since you don't have to figure out how to program the robot for each task and the robot can often do the tasks faster and more efficiently than a human.