What does it mean to have a pin-like symbol next to texting?

This means that there is an attachment, and the operation method is as follows:

1. First, find the information on the mobile phone desktop and click it, as shown below.

2. Then click on the Write SMS icon at the top right of the screen, as shown in the figure below.

3. Then in the page that opens, enter the recipient, as shown in the figure below.

4. Then click the camera icon on the left side of the screen, as shown in the figure below.

5. Finally, select the picture to send, and click the send icon, as shown in the figure below.