Here's a short description of a surge protedtor;
A surge protector is an appliance designed to protect electrical devices from voltage spikes. Surge protectors attempt to regulate the voltage supplied to an electric device by either blocking or shorting to ground voltages above a safe threshold. An outlet strip is sometimes miscalled a surge protector, but provides no such protection.
Link to pic;
Surge_protector.jpg
THANX RICHý