Idk what is that but thank you so much for telling me that knowledge, i will search and check~! thank youuuuuuu muah~🥰

No problem! Power surge protector is special type of protection against over spiked electricity caused by lightning. It can cause serious damage to computer to any electronic items. electronics.howstuffworks.com/gadgets/home... (All are in English. Idk if you can translate into Korean)

How Surge Protectors Work

One piece of equipment you need at home is a surge protector. They safeguard your high-tech electronic devices from power surges. But how do you know which ones are best?