Troubleshooting is when you have a problem with something and you try to figure out why it isn't working. Imagine you are playing with a toy robot and suddenly it stops working. Troubleshooting is like looking at the robot to figure out why it won't work. You might look at the batteries to make sure they're not dead, or check the wires to ensure they are properly connected. It could also mean trying out different things to see if any of them work. Troubleshooting means trying to figure out the problem and solve it.