The "Smiling Face" emoji 🙂 depicts a face with a slight smile and two small eyes, with a curved line for the mouth. It is often used to convey a friendly or positive tone in written messages.
This emoji was first introduced in 2010 as part of Unicode 6.0, and has since become one of the most commonly-used emojis. It is available on most platforms, including iOS, Android, and social media platforms like Twitter and Facebook.
In addition to its basic use as a friendly greeting or response, the Smiling Face emoji can also be combined with other emojis to convey different emotions or messages. For example, combining it with a heart emoji can indicate love or affection, while combining it with a crying/laughing emoji can indicate a lighthearted or humorous tone.