As the most standard smiling face, it expresses general happiness. However, among teens and young adults, it can sometimes be seen as a bit awkward or static compared to other emojis.

It's the most basic form, originating from the smiley faces of the early digital era. Because of this, it can sometimes feel like a mechanical smile that lacks sincerity. However, it's useful in formal situations or conversations with elders, where it can give a safe and polite impression.