This emoji expresses a quiet, resigned, or self-blaming sadness, which is different from the Crying Face (😢), so it's more often used to express one's own disappointment rather than to console someone else.

It conveys complex emotions beyond simple sadness, such as regret and helplessness, which is why teens and young adults might use it when talking about a 'reality check' moment during a tough assignment, humorously showing a resigned attitude.