Why did actress Ko So-young choose Xerf before her broadcast?

Actress Ko So-young mentioned on her YouTube channel that she received 600 shots of Xerf before her broadcast shoot. She particularly noted, "It’s a radiofrequency-based laser that makes you look lively without being obvious and provides noticeable lifting." The fact that it can be comfortably received without anesthesia, while providing immediate tightening and a natural glow, seems to be why it has become a topic among celebrities.