The neutral face emoji shows a straight, expressionless face. It usually means no strong reaction, seriousness, indifference, awkward silence, or a flat mood.
😐
Common uses
People use it when they are not amused, not impressed, unsure how to respond, or trying to keep the tone plain.
Neutral versus annoyed
Neutral face is quieter than an eye roll or facepalm. It can still feel cold if the conversation expected warmth.
For a polite but warmer response, the slightly smiling face emoji is usually better.