1, the other party needs private space: the other party may just need some private space or be busy, so he chose not to be disturbed for the time being.

2. Avoid interruptions: The other party may want to avoid being disturbed for a certain period of time, such as studying, working or dealing with other important affairs.

3. Protect privacy: Sometimes, people may set "Do Not Disturb" to avoid misunderstanding by their family or partners, especially if they have a fixed partner or are married.

4. Personal habits: Some people may habitually set Do Not Disturb, for example, they like to process all information at once and don't want to be disturbed by frequent WeChat.

5. Communication habits: If you often send messages to the other party, and the other party often fails to reply in time, this may lead the other party to choose not to disturb, so as to reduce interference.