There is an option to send a read receipt in iMessage. What does that mean?

The option of "send a read receipt" in iMessage means that after the information sent by others is clicked and read by yourself, it will inform others that they have finished reading the information. You can turn this feature on in Settings Info.

Materials/tools: iPhone8.

The specific operation includes the following steps:

First, open "Settings" on the phone desktop.

2. Open "Settings", find the "Information" column, and click to enter the next step.

3. Find the option "Send a read receipt" on the information page.

4. Finally, click the option on the right side of "Send Read Receipt" to turn this function off/on.