What is a line conditioner used for?
Thereof, is a power conditioner necessary?
A power conditioner's purpose is to clean and condition electrical power before it reaches the hardware that is plugged into it, but is it really needed with modern hardware? A surge protector or surge strip does help protect your equipment against power surges and impulses, just as the name suggests.
Also to know, what is the difference between a surge protector and a power conditioner?
Check before you buy. Typically a line conditioner should protect you from surges and sages in line power ie brown outs. A surge protector will not protect you from sags which can damage your equipment. Line conditioners work by taking a variable input voltage and regulating it to a steadier one.
The Furman P-1800 AR Advanced Level Voltage Regulator/Power Conditioner, claims to offer “True RMS Voltage Regulation delivers a stable 120 volts of AC power to protect equipment from problems caused by AC line voltage irregularities.”