Safety switches as the name suggests are designed to save the lives of humans. these switches are known to identify the loss of current from an electric circuit. The identification will help you realise the possibility of electric shock. As soon this is detected, the power will be cut off in only few milliseconds.
Safety switches have been made essential in Australia and other parts of the world since 1990 on all new power outlet circuits of new homes. Still there are many old homes and office buildings where these safety switches are not installed. So in those cases, the homes are not protected especially for children. There are many types of home safety switches which are used for different purposes.