Active energy use (when one hits the on/off button on the de ice/rekote/appliance)) is a visible cost as one sees the energy bring used.
There are however significant savings from removing passive energy use from a home. Passive energy use is when a device is left plugged in with the power point switch left on. This is also known as standby power and can cost $100s per year with no obvious benefit...except to those who receive money fror your power consumption. Many washing machines, TVs, computers, microwaves, ovens etc consume power of the device button is off but the devicemos still plugged in and the power point switched on.
Best option is to turn all devices and appliances not in use off at the wall (with exception of fridges or life saving devices).