What's the difference between blue and green when Apple sends text messages?

Different sending methods, different display contents and different application scenarios.

1, sent in different ways: blue means to send via iMessage, and green means to send via SMS.

2. Display content is different: blue shows sender, receiver, message content, time and other information, while green only shows sender, receiver, message content and other information.

3. Different application scenarios: blue is suitable for sending multimedia information, voice information and other information that needs real-time transmission, while green is suitable for sending simple text information and other information that does not need real-time transmission.