What is the purpose of using a switching power supply?

Now basically every family has the existence of switching power supply, indoor power supplyso do you know what the specific role of switching power supply is?

One of the biggest features of the transition power supply is that it is convenient for us to control the on and off of lamps. Another function is to protect the circuit at home and prevent the circuit from appearing in a simple circuit. natural way.

It's just because the significance of changing the power supply is relatively large, so when purchasing the power supply grade, you should focus on the relevant documents and recommendations of your own products. It has to be very fast, and there may be absolutely no way to protect it from short circuits.