Imagine that you have a toy that needs a certain amount of battery power to make it work properly. If you give it too little power, the toy won't work as well, and if you give it too much power, it might get damaged.
Voltage optimisation is like having someone who can adjust the amount of battery power being given to your toy so that it gets just the right amount it needs to work properly without any damage.
In real life, instead of toys and batteries, we have electrical devices like lights and appliances that need a certain amount of electricity to work properly. If they get too much electricity, they can overheat and wear out faster, and if they get too little, they won't work as well.
Voltage optimisation is a way of adjusting the amount of electricity that's being supplied to these devices so that they get just the right amount they need to work well without wasting any electricity. This can save energy, reduce costs, and help protect the environment by reducing carbon emissions.