What does it mean that Apple's mobile phone is busy?

This is a reminder, that is, if someone calls you and you are busy here, you will get such a message prompt. You don't need to set this here.

How to turn off Apple's busy system: 1, turn on the phone,

2. Slide the bottom of the screen upward, and a page similar to a toolbar will appear, which is convenient for users to quickly turn on or off a corresponding function, the Moon icon, that is, the "do not disturb mode" button.

3. Click on it, and you will see that the color of the icon turns dark, and the prompt "Do not disturb mode is closed" appears above, indicating that the function has been closed.