Joke Collection Website - Public benefit messages - What does the bell that information slides to the left mean?

What does the bell that information slides to the left mean?

The crossed clock symbol indicates silence.

That is to say, when the other party sends you a message, there will be no prompt tone on your side, and there is no sign of receiving the message on the panel, but if you open the panel, if he sends you a message, there will be a little red dot prompt on it.