New electrical Appliances come with an energy efficiency rating
(EU Energy Label)
Appliances are rated with a letter form A to G.
A being the most efficient.
The majority of modern appliances are A so you shouldn’t settle for anything less.
Only by turning an appliance off at the wall do they stop using any electricity.
And don’t believe people who say that turning an appliance off and on again uses more energy than leaving it on standby.
That is only the devil possessing your friends or work colleague.