A bathroom shaver socket is a specialized electrical socket designed for safe use of electrical shavers in the bathroom.
The bathroom shaver socket is mounted in an isolation transformer that cuts it off from the rest of the electrical system. This limits the risk of electrical shock, a concern in the bathroom where lots of water can be present.
In addition, the current is very low. It will power a shaver or electric toothbrush, but not an item like a heater or a hair dryer. The circuit will shut down if it gets too hot, thus keeping the user as safe as possible.