What does it mean that the message status has been delivered when Apple sends a text message?

Delivered indicates that the receiver has successfully received it.

The reason for this is the following：

1. There will be a short message center number in the settings of the short message function in the mobile phone. When sending a short message, the short message is actually sent to this short message center first, and then sent to the user with the specified number through it, which is equivalent to passing through a transit station dedicated to processing short message data. Sending only means that the short message has arrived at the short message center, and sending only means that the whole sending process of the short message is successful.

2. There is a service reporting function in the general SMS settings. When this function is turned on, the receiver will return the service report when receiving the short message. When the sender receives this report, it means that the receiver has successfully received it, which is very convenient.