Reyaz123 :
It doesn't protect software itself but your Pc components like the PSU and such from getting fried from power surges. It is important to keep these protected at all time
It does if you ignore numbers. How many joules does that protector claim to absorb? Hundreds? Thousand? Destructive surges (that can overwhelm protection already inside appliances) can be hundreds of thousands of joules. Once we add numbers, then the claim is reversed.
Worse, protectors adjacent to computers can bypass protection inside a PSU; connect a surge destructively into a motherboard. So again, where is this protection?
Urban myths are so widespread that many even believe power restoration causes surges. Most only recite hearsay. Most believe only what was said without demanding supporting facts with numbers.
Electronics routine convert hundreds of joules surges into low voltage DC to power its semiconductors. Those are near zero surges. Effective hardware protection is performed by something complete different - also called a surge protector - that means hundreds of thousands of joules (a destructive surge) dissipates harmlessly elsewhere. That superior solution necessary to even protect plug-in protectors.
None of this is to protect from blackouts. Protection of saved data is also standard inside computer hardware.