This character is a Otro símbolo and is commonly used, that is, in no specific script.
The glyph is not a composition. Its East Asian Width is wide. In bidirectional text it acts as Other Neutral. When changing direction it is not mirrored. U+1F60C offers a line break opportunity at its position, except in some numeric contexts.
The CLDR project calls this character “cara de alivio” for use in screen reading software. It assigns these additional labels, e.g. for search in emoji pickers: aliviado, cara.
This character is designated as an emoji. It will be rendered as colorful emoji on conforming platforms. To reduce it to a monochrome character, you can combine it with Variation Selector-15: 😌︎ See the Emojipedia for more details on this character’s emoji properties.
On Youtube this character is sometimes wrongly displayed as U0001f60c.
El Wikipedia tiene la siguiente información acerca de este punto de código:
Relief is a positive emotion experienced when something unpleasant, painful or distressing has not happened or has come to an end.
Relief is often accompanied with a sigh, which signals emotional transition. People from all over the world can recognise sighs with relief, and judge relief to be a fundamental emotion.
In a 2017 study published in Psychology, relief is suggested to be an emotion that can reinforce anxiety through avoidance, or be an adaptive coping mechanism when stressed or frustrated.