Aegyo is a word used to describe the cute, playful behavior that some people use to show affection or charm others.
It might involve using a high-pitched voice, smiling with big eyes, and making cute gestures like giving a peace sign or forming a heart shape with your hands.
Some people might sing a silly song or dance in a cute way to show off their aegyo.
Basically, aegyo is all about acting cute and adorable in order to make people smile or feel warm and fuzzy inside.