In the West, it simply means the letter O or a button, but in East Asia, it's deeply connected to blood type personality theories. Although there's no scientific basis, it's used among friends for fun to guess personalities.

This emoji is an interesting case where its meaning changes significantly depending on the cultural context. Praising someone's leadership or friendliness by saying something like, "Of course you're different, you're a type 🅾️!" is a unique expression only understood by those familiar with Korean culture.