The concept refers to the action of one energy customer switching energy supplier, a switch is essentially seen as the free (by choice) movement of a customer.
The above is the official definition of switching and is being used by public energy institutions such as CEER[1] & ERGEG (forerunner to ACER[2]).
The definition was originally developed by Dr Philip E. Lewis[citation needed].
Thus measuring and assessing switching rates is necessary in order to have a correct impression of the energy markets.
This is a concept that has become particularly popular in countries such as the United Kingdom, Australia, France, Spain and Germany, where large numbers of competitor brands operate.